51632440400 has 60 divisors (see below), whose sum is σ = 125325866652. Its totient is φ = 20440043520.

The previous prime is 51632440351. The next prime is 51632440411. The reversal of 51632440400 is 404423615.

It can be written as a sum of positive squares in 6 ways, for example, as 359178304 + 51273262096 = 18952^2 + 226436^2 .

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, 626567 + ... + 704166.

Almost surely, 2^51632440400 is an apocalyptic number.

51632440400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51632440400 is an abundant number, since it is smaller than the sum of its proper divisors (73693426252).

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

51632440400 is a wasteful number, since it uses less digits than its factorization.

51632440400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330848 (or 1330837 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The spelling of 51632440400 in words is "fifty-one billion, six hundred thirty-two million, four hundred forty thousand, four hundred".