57921161686 has 64 divisors (see below), whose sum is σ = 97675200000. Its totient is φ = 25599214080.

The previous prime is 57921161681. The next prime is 57921161699. The reversal of 57921161686 is 68616112975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57921161681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44864701 + ... + 44865991.

It is an arithmetic number, because the mean of its divisors is an integer number (1526175000).

Almost surely, 2^57921161686 is an apocalyptic number.

57921161686 is a deficient number, since it is larger than the sum of its proper divisors (39754038314).

57921161686 is a wasteful number, since it uses less digits than its factorization.

57921161686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877.

The product of its digits is 1088640, while the sum is 52.

The spelling of 57921161686 in words is "fifty-seven billion, nine hundred twenty-one million, one hundred sixty-one thousand, six hundred eighty-six".