51924436991 has 32 divisors (see below), whose sum is σ = 62204018688. Its totient is φ = 42378478560.

The previous prime is 51924436979. The next prime is 51924436997. The reversal of 51924436991 is 19963442915.

It is a cyclic number.

It is not a de Polignac number, because 51924436991 - 2²² = 51920242687 is a prime.

It is a super-2 number, since 2×51924436991² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51924436997) 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, 52395506 + ... + 52396496.

It is an arithmetic number, because the mean of its divisors is an integer number (1943875584).

Almost surely, 2^51924436991 is an apocalyptic number.

51924436991 is a deficient number, since it is larger than the sum of its proper divisors (10279581697).

51924436991 is a wasteful number, since it uses less digits than its factorization.

51924436991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171.

The product of its digits is 2099520, while the sum is 53.

The spelling of 51924436991 in words is "fifty-one billion, nine hundred twenty-four million, four hundred thirty-six thousand, nine hundred ninety-one".