51202166540656 has 20 divisors (see below), whose sum is σ = 99211365517104. Its totient is φ = 25599233504000.

The previous prime is 51202166540617. The next prime is 51202166540683. The reversal of 51202166540656 is 65604566120215.

It is a super-3 number, since 3×51202166540656³ (a number of 42 digits) contains 333 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, 115382020 + ... + 115824931.

Almost surely, 2^{51202166540656} is an apocalyptic number.

It is an amenable number.

51202166540656 is a deficient number, since it is larger than the sum of its proper divisors (48009198976448).

51202166540656 is a wasteful number, since it uses less digits than its factorization.

51202166540656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231220800 (or 231220794 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 51202166540656 in words is "fifty-one trillion, two hundred two billion, one hundred sixty-six million, five hundred forty thousand, six hundred fifty-six".