51818897944 has 16 divisors (see below), whose sum is σ = 105993200520. Its totient is φ = 23554044480.

The previous prime is 51818897909. The next prime is 51818897957. The reversal of 51818897944 is 44979881815.

It is a congruent number.

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, 294425469 + ... + 294425644.

Almost surely, 2^51818897944 is an apocalyptic number.

It is an amenable number.

51818897944 is an abundant number, since it is smaller than the sum of its proper divisors (54174302576).

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

51818897944 is a wasteful number, since it uses less digits than its factorization.

51818897944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588851130 (or 588851126 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 64.

The spelling of 51818897944 in words is "fifty-one billion, eight hundred eighteen million, eight hundred ninety-seven thousand, nine hundred forty-four".