57051521686 has 8 divisors (see below), whose sum is σ = 86071949424. Its totient is φ = 28360871880.

The previous prime is 57051521641. The next prime is 57051521693. The reversal of 57051521686 is 68612515075.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×57051521686² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82444050 + ... + 82444741.

It is an arithmetic number, because the mean of its divisors is an integer number (10758993678).

Almost surely, 2^57051521686 is an apocalyptic number.

57051521686 is a deficient number, since it is larger than the sum of its proper divisors (29020427738).

57051521686 is a wasteful number, since it uses less digits than its factorization.

57051521686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164888966.

The product of its (nonzero) digits is 504000, while the sum is 46.

The spelling of 57051521686 in words is "fifty-seven billion, fifty-one million, five hundred twenty-one thousand, six hundred eighty-six".