68719476735 has 512 divisors, whose sum is σ = 166290432000. Its totient is φ = 26121388032.

The previous prime is 68719476731. The next prime is 68719476767. The reversal of 68719476735 is 53767491786.

68719476735 is a `hidden beast` number, since 6 + 87 + 19 + 476 + 73 + 5 = 666.

68719476735 is nontrivially palindromic in base 2, base 4, base 8 and base 16.

It is a Cunningham number, because it is equal to 2³⁶-1.

It is not a de Polignac number, because 68719476735 - 2² = 68719476731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

68719476735 is a nontrivial repdigit in base 2, base 4, base 8 and base 16.

It is a plaindrome in base 2, base 4, base 8 and base 16.

It is a nialpdrome in base 2, base 4, base 8 and base 16.

It is a zygodrome in base 2, base 4, base 8 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68719476731) by changing a digit.

Being equal to 16×4¹⁶-1, it is a generalized Woodall number.

It is a nontrivial repunit in base 2.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 630453861 + ... + 630453969.

It is an arithmetic number, because the mean of its divisors is an integer number (324786000).

Almost surely, 2^68719476735 is an apocalyptic number.

68719476735 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

68719476735 is an abundant number, since it is smaller than the sum of its proper divisors (97570955265).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68719476735 is a wasteful number, since it uses less digits than its factorization.

68719476735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 266 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 63.

The spelling of 68719476735 in words is "sixty-eight billion, seven hundred nineteen million, four hundred seventy-six thousand, seven hundred thirty-five".