51185372543636 has 12 divisors (see below), whose sum is σ = 89622534367380. Its totient is φ = 25578934152960.

The previous prime is 51185372543633. The next prime is 51185372543653. The reversal of 51185372543636 is 63634527358115.

It can be written as a sum of positive squares in 2 ways, for example, as 114968464900 + 51070404078736 = 339070^2 + 7146356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51185372543633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3438021341 + ... + 3438036228.

It is an arithmetic number, because the mean of its divisors is an integer number (7468544530615).

Almost surely, 2^{51185372543636} is an apocalyptic number.

It is an amenable number.

51185372543636 is a deficient number, since it is larger than the sum of its proper divisors (38437161823744).

51185372543636 is a wasteful number, since it uses less digits than its factorization.

51185372543636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876059434 (or 6876059432 counting only the distinct ones).

The product of its digits is 54432000, while the sum is 59.

The spelling of 51185372543636 in words is "fifty-one trillion, one hundred eighty-five billion, three hundred seventy-two million, five hundred forty-three thousand, six hundred thirty-six".