51364331285520 has 160 divisors (see below), whose sum is σ = 174270645964800. Its totient is φ = 12411398776320.

The previous prime is 51364331285431. The next prime is 51364331285551. The reversal of 51364331285520 is 2558213346315.

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 51364331285520.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30877120 + ... + 32498079.

It is an arithmetic number, because the mean of its divisors is an integer number (1089191537280).

Almost surely, 2^{51364331285520} is an apocalyptic number.

It is an amenable number.

51364331285520 is an abundant number, since it is smaller than the sum of its proper divisors (122906314679280).

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

51364331285520 is a wasteful number, since it uses less digits than its factorization.

51364331285520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63375533 (or 63375527 counting only the distinct ones).

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

The spelling of 51364331285520 in words is "fifty-one trillion, three hundred sixty-four billion, three hundred thirty-one million, two hundred eighty-five thousand, five hundred twenty".