51284544967 has 4 divisors (see below), whose sum is σ = 51311524536. Its totient is φ = 51257565400.

The previous prime is 51284544959. The next prime is 51284544977. The reversal of 51284544967 is 76944548215.

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 51284544967 - 2³ = 51284544959 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 (51284544917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13486933 + ... + 13490734.

It is an arithmetic number, because the mean of its divisors is an integer number (12827881134).

Almost surely, 2^51284544967 is an apocalyptic number.

51284544967 is a deficient number, since it is larger than the sum of its proper divisors (26979569).

51284544967 is a wasteful number, since it uses less digits than its factorization.

51284544967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26979568.

The product of its digits is 9676800, while the sum is 55.

The spelling of 51284544967 in words is "fifty-one billion, two hundred eighty-four million, five hundred forty-four thousand, nine hundred sixty-seven".