51164103640525 has 24 divisors (see below), whose sum is σ = 67177333846440. Its totient is φ = 38522484879360.

The previous prime is 51164103640511. The next prime is 51164103640571. The reversal of 51164103640525 is 52504630146115.

It can be written as a sum of positive squares in 12 ways, for example, as 29571474217156 + 21592629423369 = 5437966^2 + 4646787^2 .

It is not a de Polignac number, because 51164103640525 - 2¹³ = 51164103632333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13726447 + ... + 17051203.

It is an arithmetic number, because the mean of its divisors is an integer number (2799055576935).

Almost surely, 2^{51164103640525} is an apocalyptic number.

It is an amenable number.

51164103640525 is a deficient number, since it is larger than the sum of its proper divisors (16013230205915).

51164103640525 is a wasteful number, since it uses less digits than its factorization.

51164103640525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360993 (or 3360988 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 51164103640525 in words is "fifty-one trillion, one hundred sixty-four billion, one hundred three million, six hundred forty thousand, five hundred twenty-five".