51587574879 has 8 divisors (see below), whose sum is σ = 69325035520. Its totient is φ = 34120915416.

The previous prime is 51587574847. The next prime is 51587574887. The reversal of 51587574879 is 97847578515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51587574879 - 2⁵ = 51587574847 is a prime.

It is a super-2 number, since 2×51587574879² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51587576879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67699849 + ... + 67700610.

It is an arithmetic number, because the mean of its divisors is an integer number (8665629440).

Almost surely, 2^51587574879 is an apocalyptic number.

51587574879 is a deficient number, since it is larger than the sum of its proper divisors (17737460641).

51587574879 is a wasteful number, since it uses less digits than its factorization.

51587574879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135400589.

The product of its digits is 98784000, while the sum is 66.

The spelling of 51587574879 in words is "fifty-one billion, five hundred eighty-seven million, five hundred seventy-four thousand, eight hundred seventy-nine".