51006605600 has 36 divisors (see below), whose sum is σ = 124519877874. Its totient is φ = 20402641920.

The previous prime is 51006605593. The next prime is 51006605621. The reversal of 51006605600 is 650660015.

It can be written as a sum of positive squares in 3 ways, for example, as 46409223184 + 4597382416 = 215428^2 + 67804^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31878329 + ... + 31879928.

Almost surely, 2^51006605600 is an apocalyptic number.

51006605600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51006605600 is an abundant number, since it is smaller than the sum of its proper divisors (73513272274).

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

51006605600 is a wasteful number, since it uses less digits than its factorization.

51006605600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63758277 (or 63758264 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 51006605600 in words is "fifty-one billion, six million, six hundred five thousand, six hundred".