51106623761 has 4 divisors (see below), whose sum is σ = 51108124224. Its totient is φ = 51105123300.

The previous prime is 51106623751. The next prime is 51106623773. The reversal of 51106623761 is 16732660115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51106623761 - 2¹⁸ = 51106361617 is a prime.

It is a super-2 number, since 2×51106623761² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51106623751) 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, 697925 + ... + 767666.

It is an arithmetic number, because the mean of its divisors is an integer number (12777031056).

Almost surely, 2^51106623761 is an apocalyptic number.

It is an amenable number.

51106623761 is a deficient number, since it is larger than the sum of its proper divisors (1500463).

51106623761 is a wasteful number, since it uses less digits than its factorization.

51106623761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500462.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 51106623761 in words is "fifty-one billion, one hundred six million, six hundred twenty-three thousand, seven hundred sixty-one".