51688216437464 has 16 divisors (see below), whose sum is σ = 96915484172520. Its totient is φ = 25844087324800.

The previous prime is 51688216437437. The next prime is 51688216437479. The reversal of 51688216437464 is 46473461288615.

It is a super-2 number, since 2×51688216437464² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51688216437464.

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, 14486867 + ... + 17698749.

Almost surely, 2^{51688216437464} is an apocalyptic number.

It is an amenable number.

51688216437464 is a deficient number, since it is larger than the sum of its proper divisors (45227267735056).

51688216437464 is a wasteful number, since it uses less digits than its factorization.

51688216437464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5223490 (or 5223486 counting only the distinct ones).

The product of its digits is 185794560, while the sum is 65.

The spelling of 51688216437464 in words is "fifty-one trillion, six hundred eighty-eight billion, two hundred sixteen million, four hundred thirty-seven thousand, four hundred sixty-four".