51013974465 has 48 divisors (see below), whose sum is σ = 90108383040. Its totient is φ = 26691154560.

The previous prime is 51013974397. The next prime is 51013974481. The reversal of 51013974465 is 56447931015.

51013974465 is a `hidden beast` number, since 51 + 0 + 139 + 7 + 4 + 465 = 666.

It is not a de Polignac number, because 51013974465 - 2¹⁰ = 51013973441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51013974465.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1284039 + ... + 1323171.

It is an arithmetic number, because the mean of its divisors is an integer number (1877257980).

Almost surely, 2^51013974465 is an apocalyptic number.

It is an amenable number.

51013974465 is a deficient number, since it is larger than the sum of its proper divisors (39094408575).

51013974465 is a wasteful number, since it uses less digits than its factorization.

51013974465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39694 (or 39691 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 51013974465 in words is "fifty-one billion, thirteen million, nine hundred seventy-four thousand, four hundred sixty-five".