51552025520 has 20 divisors (see below), whose sum is σ = 119858459520. Its totient is φ = 20620810176.

The previous prime is 51552025501. The next prime is 51552025549. The reversal of 51552025520 is 2552025515.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×51552025520² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322200080 + ... + 322200239.

It is an arithmetic number, because the mean of its divisors is an integer number (5992922976).

Almost surely, 2^51552025520 is an apocalyptic number.

It is an amenable number.

51552025520 is an abundant number, since it is smaller than the sum of its proper divisors (68306434000).

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

51552025520 is a wasteful number, since it uses less digits than its factorization.

51552025520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644400332 (or 644400326 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 32.

The spelling of 51552025520 in words is "fifty-one billion, five hundred fifty-two million, twenty-five thousand, five hundred twenty".