56693081521 has 4 divisors (see below), whose sum is σ = 57068532544. Its totient is φ = 56317630500.

The previous prime is 56693081513. The next prime is 56693081527. The reversal of 56693081521 is 12518039665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56693081521 - 2³ = 56693081513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56693081527) 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 3 ways as a sum of consecutive naturals, for example, 187725285 + ... + 187725586.

It is an arithmetic number, because the mean of its divisors is an integer number (14267133136).

Almost surely, 2^56693081521 is an apocalyptic number.

It is an amenable number.

56693081521 is a deficient number, since it is larger than the sum of its proper divisors (375451023).

56693081521 is a wasteful number, since it uses less digits than its factorization.

56693081521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375451022.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 56693081521 in words is "fifty-six billion, six hundred ninety-three million, eighty-one thousand, five hundred twenty-one".