51553520502 has 64 divisors (see below), whose sum is σ = 115654936320. Its totient is φ = 15186787200.

The previous prime is 51553520489. The next prime is 51553520507. The reversal of 51553520502 is 20502535515.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51553520507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 313677 + ... + 448887.

It is an arithmetic number, because the mean of its divisors is an integer number (1807108380).

Almost surely, 2^51553520502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51553520502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57827468160).

51553520502 is an abundant number, since it is smaller than the sum of its proper divisors (64101415818).

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

51553520502 is a wasteful number, since it uses less digits than its factorization.

51553520502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135389.

The product of its (nonzero) digits is 37500, while the sum is 33.

The spelling of 51553520502 in words is "fifty-one billion, five hundred fifty-three million, five hundred twenty thousand, five hundred two".