51147602540 has 24 divisors (see below), whose sum is σ = 108395382480. Its totient is φ = 20271342528.

The previous prime is 51147602533. The next prime is 51147602573. The reversal of 51147602540 is 4520674115.

It is a self number, because there is not a number n which added to its sum of digits gives 51147602540.

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 7 ways as a sum of consecutive naturals, for example, 11728922 + ... + 11733281.

It is an arithmetic number, because the mean of its divisors is an integer number (4516474270).

Almost surely, 2^51147602540 is an apocalyptic number.

It is an amenable number.

51147602540 is an abundant number, since it is smaller than the sum of its proper divisors (57247779940).

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

51147602540 is a wasteful number, since it uses less digits than its factorization.

51147602540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23462321 (or 23462319 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The spelling of 51147602540 in words is "fifty-one billion, one hundred forty-seven million, six hundred two thousand, five hundred forty".