51039292418 has 4 divisors (see below), whose sum is σ = 76558938630. Its totient is φ = 25519646208.

The previous prime is 51039292417. The next prime is 51039292439. The reversal of 51039292418 is 81429293015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36482146009 + 14557146409 = 191003^2 + 120653^2 .

It is a super-2 number, since 2×51039292418² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51039292417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12759823103 + ... + 12759823106.

Almost surely, 2^51039292418 is an apocalyptic number.

51039292418 is a deficient number, since it is larger than the sum of its proper divisors (25519646212).

51039292418 is a wasteful number, since it uses less digits than its factorization.

51039292418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25519646211.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 51039292418 in words is "fifty-one billion, thirty-nine million, two hundred ninety-two thousand, four hundred eighteen".