51219490808 has 48 divisors (see below), whose sum is σ = 102382412400. Its totient is φ = 24017208320.

The previous prime is 51219490799. The next prime is 51219490813. The reversal of 51219490808 is 80809491215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 610253 + ... + 689091.

It is an arithmetic number, because the mean of its divisors is an integer number (2132966925).

Almost surely, 2^51219490808 is an apocalyptic number.

It is an amenable number.

51219490808 is a deficient number, since it is larger than the sum of its proper divisors (51162921592).

51219490808 is a wasteful number, since it uses less digits than its factorization.

51219490808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79160 (or 79139 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 51219490808 in words is "fifty-one billion, two hundred nineteen million, four hundred ninety thousand, eight hundred eight".