51372139940357 has 2 divisors, whose sum is σ = 51372139940358. Its totient is φ = 51372139940356.

The previous prime is 51372139940309. The next prime is 51372139940371. The reversal of 51372139940357 is 75304993127315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39103085536516 + 12269054403841 = 6253246^2 + 3502721^2 .

It is a cyclic number.

It is not a de Polignac number, because 51372139940357 - 2⁶ = 51372139940293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51372139940296 and 51372139940305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51372139940057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25686069970178 + 25686069970179.

It is an arithmetic number, because the mean of its divisors is an integer number (25686069970179).

Almost surely, 2^{51372139940357} is an apocalyptic number.

It is an amenable number.

51372139940357 is a deficient number, since it is larger than the sum of its proper divisors (1).

51372139940357 is an equidigital number, since it uses as much as digits as its factorization.

51372139940357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21432600, while the sum is 59.

The spelling of 51372139940357 in words is "fifty-one trillion, three hundred seventy-two billion, one hundred thirty-nine million, nine hundred forty thousand, three hundred fifty-seven".