64790709984 has 288 divisors, whose sum is σ = 247383811584. Its totient is φ = 15534167040.

The previous prime is 64790709983. The next prime is 64790710037. The reversal of 64790709984 is 48990709746.

64790709984 is a `hidden beast` number, since 6 + 479 + 0 + 70 + 9 + 98 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×64790709984² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64790709983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 175917 + ... + 400659.

It is an arithmetic number, because the mean of its divisors is an integer number (858971568).

Almost surely, 2^64790709984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64790709984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123691905792).

64790709984 is an abundant number, since it is smaller than the sum of its proper divisors (182593101600).

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

64790709984 is a wasteful number, since it uses less digits than its factorization.

64790709984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224790 (or 224779 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The spelling of 64790709984 in words is "sixty-four billion, seven hundred ninety million, seven hundred nine thousand, nine hundred eighty-four".