51504503520 has 96 divisors (see below), whose sum is σ = 169293100032. Its totient is φ = 13137377792.

The previous prime is 51504503471. The next prime is 51504503537. The reversal of 51504503520 is 2530540515.

It is a happy number.

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 (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2321592 + ... + 2343671.

It is an arithmetic number, because the mean of its divisors is an integer number (1763469792).

Almost surely, 2^51504503520 is an apocalyptic number.

It is an amenable number.

51504503520 is an abundant number, since it is smaller than the sum of its proper divisors (117788596512).

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

51504503520 is a wasteful number, since it uses less digits than its factorization.

51504503520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665304 (or 4665296 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 51504503520 in words is "fifty-one billion, five hundred four million, five hundred three thousand, five hundred twenty".