51271245635425 has 12 divisors (see below), whose sum is σ = 64159613807740. Its totient is φ = 40640693785920.

The previous prime is 51271245635381. The next prime is 51271245635453. The reversal of 51271245635425 is 52453654217215.

It can be written as a sum of positive squares in 6 ways, for example, as 3523684613904 + 47747561021521 = 1877148^2 + 6909961^2 .

It is not a de Polignac number, because 51271245635425 - 2²⁵ = 51271212080993 is a prime.

It is a super-2 number, since 2×51271245635425² (a number of 28 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9407565282 + ... + 9407570731.

Almost surely, 2^{51271245635425} is an apocalyptic number.

It is an amenable number.

51271245635425 is a deficient number, since it is larger than the sum of its proper divisors (12888368172315).

51271245635425 is a wasteful number, since it uses less digits than its factorization.

51271245635425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18815136132 (or 18815136127 counting only the distinct ones).

The product of its digits is 10080000, while the sum is 52.

The spelling of 51271245635425 in words is "fifty-one trillion, two hundred seventy-one billion, two hundred forty-five million, six hundred thirty-five thousand, four hundred twenty-five".