51617615425 has 6 divisors (see below), whose sum is σ = 64005843158. Its totient is φ = 41294092320.

The previous prime is 51617615411. The next prime is 51617615449. The reversal of 51617615425 is 52451671615.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 12673355776 + 38944259649 = 112576^2 + 197343^2 .

It is not a de Polignac number, because 51617615425 - 2⁷ = 51617615297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1032352284 + ... + 1032352333.

Almost surely, 2^51617615425 is an apocalyptic number.

It is an amenable number.

51617615425 is a deficient number, since it is larger than the sum of its proper divisors (12388227733).

51617615425 is a wasteful number, since it uses less digits than its factorization.

51617615425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064704627 (or 2064704622 counting only the distinct ones).

The product of its digits is 252000, while the sum is 43.

The spelling of 51617615425 in words is "fifty-one billion, six hundred seventeen million, six hundred fifteen thousand, four hundred twenty-five".