51642362615520 has 96 divisors (see below), whose sum is σ = 162675632931840. Its totient is φ = 13771111242240.

The previous prime is 51642362615509. The next prime is 51642362615561. The reversal of 51642362615520 is 2551626324615.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 51642362615520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37000101 + ... + 38370459.

It is an arithmetic number, because the mean of its divisors is an integer number (1694537843040).

Almost surely, 2^{51642362615520} is an apocalyptic number.

It is an amenable number.

51642362615520 is an abundant number, since it is smaller than the sum of its proper divisors (111033270316320).

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

51642362615520 is a wasteful number, since it uses less digits than its factorization.

51642362615520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448888 (or 1448880 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 51642362615520 in words is "fifty-one trillion, six hundred forty-two billion, three hundred sixty-two million, six hundred fifteen thousand, five hundred twenty".