51368436621207 has 12 divisors (see below), whose sum is σ = 74199078564624. Its totient is φ = 34245520260000.

The previous prime is 51368436621091. The next prime is 51368436621277. The reversal of 51368436621207 is 70212663486315.

51368436621207 is a `hidden beast` number, since 5 + 1 + 3 + 6 + 8 + 4 + 3 + 6 + 621 + 2 + 0 + 7 = 666.

It is not a de Polignac number, because 51368436621207 - 2⁸ = 51368436620951 is a prime.

It is a super-4 number, since 4×51368436621207⁴ (a number of 56 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51368436621277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5494419 + ... + 11529332.

It is an arithmetic number, because the mean of its divisors is an integer number (6183256547052).

Almost surely, 2^{51368436621207} is an apocalyptic number.

51368436621207 is a deficient number, since it is larger than the sum of its proper divisors (22830641943417).

51368436621207 is a wasteful number, since it uses less digits than its factorization.

51368436621207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17359030 (or 17359027 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 51368436621207 in words is "fifty-one trillion, three hundred sixty-eight billion, four hundred thirty-six million, six hundred twenty-one thousand, two hundred seven".