51605001600 has 96 divisors (see below), whose sum is σ = 169974005640. Its totient is φ = 13761331200.

The previous prime is 51605001557. The next prime is 51605001619. The reversal of 51605001600 is 610050615.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 2678161 + ... + 2697360.

Almost surely, 2^51605001600 is an apocalyptic number.

51605001600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51605001600 is an abundant number, since it is smaller than the sum of its proper divisors (118369004040).

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

51605001600 is a wasteful number, since it uses less digits than its factorization.

51605001600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5375548 (or 5375531 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 51605001600 in words is "fifty-one billion, six hundred five million, one thousand, six hundred".