51657648236536 has 16 divisors (see below), whose sum is σ = 97273790406000. Its totient is φ = 25717970794944.

The previous prime is 51657648236431. The next prime is 51657648236563. The reversal of 51657648236536 is 63563284675615.

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, 13856663436 + ... + 13856667163.

It is an arithmetic number, because the mean of its divisors is an integer number (6079611900375).

Almost surely, 2^{51657648236536} is an apocalyptic number.

It is an amenable number.

51657648236536 is a deficient number, since it is larger than the sum of its proper divisors (45616142169464).

51657648236536 is a wasteful number, since it uses less digits than its factorization.

51657648236536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27713330838 (or 27713330834 counting only the distinct ones).

The product of its digits is 653184000, while the sum is 67.

The spelling of 51657648236536 in words is "fifty-one trillion, six hundred fifty-seven billion, six hundred forty-eight million, two hundred thirty-six thousand, five hundred thirty-six".