51504520000 has 70 divisors (see below), whose sum is σ = 127714569818. Its totient is φ = 20601792000.

The previous prime is 51504519967. The next prime is 51504520003. The reversal of 51504520000 is 2540515.

It can be written as a sum of positive squares in 5 ways, for example, as 32210198784 + 19294321216 = 179472^2 + 138904^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51504520003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 603807 + ... + 683806.

Almost surely, 2^51504520000 is an apocalyptic number.

51504520000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51504520000 is an abundant number, since it is smaller than the sum of its proper divisors (76210049818).

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

51504520000 is an equidigital number, since it uses as much as digits as its factorization.

51504520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287645 (or 1287620 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The spelling of 51504520000 in words is "fifty-one billion, five hundred four million, five hundred twenty thousand".