51436562572397 has 2 divisors, whose sum is σ = 51436562572398. Its totient is φ = 51436562572396.

The previous prime is 51436562572393. The next prime is 51436562572477. The reversal of 51436562572397 is 79327526563415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46110224783401 + 5326337788996 = 6790451^2 + 2307886^2 .

It is a cyclic number.

It is not a de Polignac number, because 51436562572397 - 2² = 51436562572393 is a prime.

It is a super-2 number, since 2×51436562572397² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51436562572393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25718281286198 + 25718281286199.

It is an arithmetic number, because the mean of its divisors is an integer number (25718281286199).

Almost surely, 2^{51436562572397} is an apocalyptic number.

It is an amenable number.

51436562572397 is a deficient number, since it is larger than the sum of its proper divisors (1).

51436562572397 is an equidigital number, since it uses as much as digits as its factorization.

51436562572397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768000, while the sum is 65.

The spelling of 51436562572397 in words is "fifty-one trillion, four hundred thirty-six billion, five hundred sixty-two million, five hundred seventy-two thousand, three hundred ninety-seven".