51881392601 has 2 divisors, whose sum is σ = 51881392602. Its totient is φ = 51881392600.

The previous prime is 51881392597. The next prime is 51881392621. The reversal of 51881392601 is 10629318815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49505805001 + 2375587600 = 222499^2 + 48740^2 .

It is a cyclic number.

It is not a de Polignac number, because 51881392601 - 2² = 51881392597 is a prime.

It is not a weakly prime, because it can be changed into another prime (51881392621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25940696300 + 25940696301.

It is an arithmetic number, because the mean of its divisors is an integer number (25940696301).

Almost surely, 2^51881392601 is an apocalyptic number.

It is an amenable number.

51881392601 is a deficient number, since it is larger than the sum of its proper divisors (1).

51881392601 is an equidigital number, since it uses as much as digits as its factorization.

51881392601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 51881392601 in words is "fifty-one billion, eight hundred eighty-one million, three hundred ninety-two thousand, six hundred one".