51504555020625 has 160 divisors (see below), whose sum is σ = 108993729841920. Its totient is φ = 23539697280000.

The previous prime is 51504555020621. The next prime is 51504555020641. The reversal of 51504555020625 is 52602055540515.

51504555020625 is a `hidden beast` number, since 5 + 1 + 50 + 4 + 5 + 550 + 20 + 6 + 25 = 666.

It is not a de Polignac number, because 51504555020625 - 2² = 51504555020621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (51504555020621) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 557621947 + ... + 557714303.

It is an arithmetic number, because the mean of its divisors is an integer number (681210811512).

Almost surely, 2^{51504555020625} is an apocalyptic number.

It is an amenable number.

51504555020625 is an abundant number, since it is smaller than the sum of its proper divisors (57489174821295).

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

51504555020625 is an equidigital number, since it uses as much as digits as its factorization.

51504555020625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97114 (or 97093 counting only the distinct ones).

The product of its (nonzero) digits is 1500000, while the sum is 45.

The spelling of 51504555020625 in words is "fifty-one trillion, five hundred four billion, five hundred fifty-five million, twenty thousand, six hundred twenty-five".