51618814144 has 28 divisors (see below), whose sum is σ = 108456444504. Its totient is φ = 24291206144.

The previous prime is 51618814123. The next prime is 51618814151. The reversal of 51618814144 is 44141881615.

It is a self number, because there is not a number n which added to its sum of digits gives 51618814144.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23720794 + ... + 23722969.

Almost surely, 2^51618814144 is an apocalyptic number.

It is an amenable number.

51618814144 is an abundant number, since it is smaller than the sum of its proper divisors (56837630360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51618814144 is a wasteful number, since it uses less digits than its factorization.

51618814144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47443792 (or 47443782 counting only the distinct ones).

The product of its digits is 122880, while the sum is 43.

The spelling of 51618814144 in words is "fifty-one billion, six hundred eighteen million, eight hundred fourteen thousand, one hundred forty-four".