64790825790 has 32 divisors (see below), whose sum is σ = 155521368576. Its totient is φ = 17274955040.

The previous prime is 64790825789. The next prime is 64790825851. The reversal of 64790825790 is 9752809746.

It is a super-2 number, since 2×64790825790² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64790825790.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44719 + ... + 362741.

It is an arithmetic number, because the mean of its divisors is an integer number (4860042768).

Almost surely, 2^64790825790 is an apocalyptic number.

64790825790 is an abundant number, since it is smaller than the sum of its proper divisors (90730542786).

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

64790825790 is a wasteful number, since it uses less digits than its factorization.

64790825790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324824.

The product of its (nonzero) digits is 7620480, while the sum is 57.

The spelling of 64790825790 in words is "sixty-four billion, seven hundred ninety million, eight hundred twenty-five thousand, seven hundred ninety".