51645600126625 has 16 divisors (see below), whose sum is σ = 64454379996240. Its totient is φ = 41316049948800.

The previous prime is 51645600126581. The next prime is 51645600126643. The reversal of 51645600126625 is 52662100654615.

It can be written as a sum of positive squares in 8 ways, for example, as 9720402475536 + 41925197651089 = 3117756^2 + 6474967^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51645600126625 is a prime.

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, 10185511 + ... + 14388739.

It is an arithmetic number, because the mean of its divisors is an integer number (4028398749765).

Almost surely, 2^{51645600126625} is an apocalyptic number.

It is an amenable number.

51645600126625 is a deficient number, since it is larger than the sum of its proper divisors (12808779869615).

51645600126625 is an equidigital number, since it uses as much as digits as its factorization.

51645600126625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301541 (or 4301531 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 51645600126625 in words is "fifty-one trillion, six hundred forty-five billion, six hundred million, one hundred twenty-six thousand, six hundred twenty-five".