51693930550 has 24 divisors (see below), whose sum is σ = 96220868256. Its totient is φ = 20662484640.

The previous prime is 51693930523. The next prime is 51693930551. The reversal of 51693930550 is 5503939615.

It is a self number, because there is not a number n which added to its sum of digits gives 51693930550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51693930551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307854 + ... + 445153.

It is an arithmetic number, because the mean of its divisors is an integer number (4009202844).

Almost surely, 2^51693930550 is an apocalyptic number.

51693930550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51693930550 is a deficient number, since it is larger than the sum of its proper divisors (44526937706).

51693930550 is a wasteful number, since it uses less digits than its factorization.

51693930550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754392 (or 754387 counting only the distinct ones).

The product of its (nonzero) digits is 546750, while the sum is 46.

The spelling of 51693930550 in words is "fifty-one billion, six hundred ninety-three million, nine hundred thirty thousand, five hundred fifty".