51464218867 has 4 divisors (see below), whose sum is σ = 51467917536. Its totient is φ = 51460520200.

The previous prime is 51464218853. The next prime is 51464218877. The reversal of 51464218867 is 76881246415.

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 51464218867 - 2²⁷ = 51330001139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51464218877) 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, 1828384 + ... + 1856317.

It is an arithmetic number, because the mean of its divisors is an integer number (12866979384).

Almost surely, 2^51464218867 is an apocalyptic number.

51464218867 is a deficient number, since it is larger than the sum of its proper divisors (3698669).

51464218867 is a wasteful number, since it uses less digits than its factorization.

51464218867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3698668.

The product of its digits is 2580480, while the sum is 52.

The spelling of 51464218867 in words is "fifty-one billion, four hundred sixty-four million, two hundred eighteen thousand, eight hundred sixty-seven".