61568785990 has 32 divisors (see below), whose sum is σ = 113452254720. Its totient is φ = 24045921504.

The previous prime is 61568785979. The next prime is 61568786009. The reversal of 61568785990 is 9958786516.

61568785990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 40609 + ... + 353251.

It is an arithmetic number, because the mean of its divisors is an integer number (3545382960).

Almost surely, 2^61568785990 is an apocalyptic number.

61568785990 is a deficient number, since it is larger than the sum of its proper divisors (51883468730).

61568785990 is a wasteful number, since it uses less digits than its factorization.

61568785990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313116.

The product of its (nonzero) digits is 32659200, while the sum is 64.

The spelling of 61568785990 in words is "sixty-one billion, five hundred sixty-eight million, seven hundred eighty-five thousand, nine hundred ninety".