51146640401536 has 32 divisors (see below), whose sum is σ = 105180591156480. Its totient is φ = 24748374385920.

The previous prime is 51146640401459. The next prime is 51146640401537. The reversal of 51146640401536 is 63510404664115.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×51146640401536² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51146640401537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6444885196 + ... + 6444893131.

It is an arithmetic number, because the mean of its divisors is an integer number (3286893473640).

Almost surely, 2^{51146640401536} is an apocalyptic number.

It is an amenable number.

51146640401536 is an abundant number, since it is smaller than the sum of its proper divisors (54033950754944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51146640401536 is a wasteful number, since it uses less digits than its factorization.

51146640401536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12889778372 (or 12889778360 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 51146640401536 in words is "fifty-one trillion, one hundred forty-six billion, six hundred forty million, four hundred one thousand, five hundred thirty-six".