51618008519 has 16 divisors (see below), whose sum is σ = 66430887936. Its totient is φ = 38924344800.

The previous prime is 51618008513. The next prime is 51618008539. The reversal of 51618008519 is 91580081615.

It is not a de Polignac number, because 51618008519 - 2⁴ = 51618008503 is a prime.

It is a super-2 number, since 2×51618008519² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 51618008519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51618008513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10809932 + ... + 10814705.

It is an arithmetic number, because the mean of its divisors is an integer number (4151930496).

Almost surely, 2^51618008519 is an apocalyptic number.

51618008519 is a deficient number, since it is larger than the sum of its proper divisors (14812879417).

51618008519 is a wasteful number, since it uses less digits than its factorization.

51618008519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21624686.

The product of its (nonzero) digits is 86400, while the sum is 44.

The spelling of 51618008519 in words is "fifty-one billion, six hundred eighteen million, eight thousand, five hundred nineteen".