51505009600 has 84 divisors (see below), whose sum is σ = 138255880968. Its totient is φ = 18729088000.

The previous prime is 51505009579. The next prime is 51505009631. The reversal of 51505009600 is 690050515.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1445611 + ... + 1480810.

Almost surely, 2^51505009600 is an apocalyptic number.

51505009600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51505009600 is an abundant number, since it is smaller than the sum of its proper divisors (86750871368).

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

51505009600 is a wasteful number, since it uses less digits than its factorization.

51505009600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926454 (or 2926439 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 31.

The spelling of 51505009600 in words is "fifty-one billion, five hundred five million, nine thousand, six hundred".