51381573232607 has 4 divisors (see below), whose sum is σ = 54404018716896. Its totient is φ = 48359127748320.

The previous prime is 51381573232567. The next prime is 51381573232637. The reversal of 51381573232607 is 70623237518315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51381573232607 - 2³⁸ = 51106695325663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51381573232637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1511222742119 + ... + 1511222742152.

It is an arithmetic number, because the mean of its divisors is an integer number (13601004679224).

Almost surely, 2^{51381573232607} is an apocalyptic number.

51381573232607 is a deficient number, since it is larger than the sum of its proper divisors (3022445484289).

51381573232607 is a wasteful number, since it uses less digits than its factorization.

51381573232607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022445484288.

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 51381573232607 in words is "fifty-one trillion, three hundred eighty-one billion, five hundred seventy-three million, two hundred thirty-two thousand, six hundred seven".