51607656225 has 48 divisors (see below), whose sum is σ = 94873292800. Its totient is φ = 27504308160.

The previous prime is 51607656173. The next prime is 51607656229. The reversal of 51607656225 is 52265670615.

51607656225 is a `hidden beast` number, since 5 + 1 + 60 + 7 + 6 + 562 + 25 = 666.

It is not a de Polignac number, because 51607656225 - 2⁸ = 51607655969 is a prime.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51607656229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 937824 + ... + 991326.

Almost surely, 2^51607656225 is an apocalyptic number.

It is an amenable number.

51607656225 is a deficient number, since it is larger than the sum of its proper divisors (43265636575).

51607656225 is a wasteful number, since it uses less digits than its factorization.

51607656225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54951 (or 54940 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 51607656225 in words is "fifty-one billion, six hundred seven million, six hundred fifty-six thousand, two hundred twenty-five".