51467397657 has 32 divisors (see below), whose sum is σ = 77997158400. Its totient is φ = 29925951552.

The previous prime is 51467397647. The next prime is 51467397673. The reversal of 51467397657 is 75679376415.

It is a happy number.

It is not a de Polignac number, because 51467397657 - 2²⁷ = 51333179929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51467397657.

It is not an unprimeable number, because it can be changed into a prime (51467397617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189208 + ... + 372470.

It is an arithmetic number, because the mean of its divisors is an integer number (2437411200).

Almost surely, 2^51467397657 is an apocalyptic number.

51467397657 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

51467397657 is a deficient number, since it is larger than the sum of its proper divisors (26529760743).

51467397657 is a wasteful number, since it uses less digits than its factorization.

51467397657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183677.

The product of its digits is 33339600, while the sum is 60.

The spelling of 51467397657 in words is "fifty-one billion, four hundred sixty-seven million, three hundred ninety-seven thousand, six hundred fifty-seven".