51572336517 has 12 divisors (see below), whose sum is σ = 80223634764. Its totient is φ = 31736822400.

The previous prime is 51572336513. The next prime is 51572336531. The reversal of 51572336517 is 71563327515.

51572336517 is a `hidden beast` number, since 5 + 1 + 572 + 3 + 3 + 65 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15375752001 + 36196584516 = 123999^2 + 190254^2 .

It is not a de Polignac number, because 51572336517 - 2² = 51572336513 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51572336513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220394484 + ... + 220394717.

It is an arithmetic number, because the mean of its divisors is an integer number (6685302897).

Almost surely, 2^51572336517 is an apocalyptic number.

It is an amenable number.

51572336517 is a deficient number, since it is larger than the sum of its proper divisors (28651298247).

51572336517 is a wasteful number, since it uses less digits than its factorization.

51572336517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440789220 (or 440789217 counting only the distinct ones).

The product of its digits is 661500, while the sum is 45.

The spelling of 51572336517 in words is "fifty-one billion, five hundred seventy-two million, three hundred thirty-six thousand, five hundred seventeen".