68638870489 has 16 divisors (see below), whose sum is σ = 87430320000. Its totient is φ = 52458188544.

The previous prime is 68638870439. The next prime is 68638870493. The reversal of 68638870489 is 98407883686.

It is a cyclic number.

It is not a de Polignac number, because 68638870489 - 2⁹ = 68638869977 is a prime.

It is a super-2 number, since 2×68638870489² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68638870439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15176614 + ... + 15181135.

It is an arithmetic number, because the mean of its divisors is an integer number (5464395000).

Almost surely, 2^68638870489 is an apocalyptic number.

It is an amenable number.

68638870489 is a deficient number, since it is larger than the sum of its proper divisors (18791449511).

68638870489 is a wasteful number, since it uses less digits than its factorization.

68638870489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30357792.

The product of its (nonzero) digits is 111476736, while the sum is 67.

The spelling of 68638870489 in words is "sixty-eight billion, six hundred thirty-eight million, eight hundred seventy thousand, four hundred eighty-nine".