51917288044 has 6 divisors (see below), whose sum is σ = 90855254084. Its totient is φ = 25958644020.

The previous prime is 51917288029. The next prime is 51917288047. The reversal of 51917288044 is 44088271915.

It is not an unprimeable number, because it can be changed into a prime (51917288047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6489661002 + ... + 6489661009.

Almost surely, 2^51917288044 is an apocalyptic number.

It is an amenable number.

51917288044 is a deficient number, since it is larger than the sum of its proper divisors (38937966040).

51917288044 is a wasteful number, since it uses less digits than its factorization.

51917288044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12979322015 (or 12979322013 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 51917288044 in words is "fifty-one billion, nine hundred seventeen million, two hundred eighty-eight thousand, forty-four".