51540534400 has 96 divisors (see below), whose sum is σ = 132857121600. Its totient is φ = 19719828480.

The previous prime is 51540534343. The next prime is 51540534413. The reversal of 51540534400 is 443504515.

It is a happy 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, 276540 + ... + 423739.

It is an arithmetic number, because the mean of its divisors is an integer number (1383928350).

Almost surely, 2^51540534400 is an apocalyptic number.

51540534400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51540534400 is an abundant number, since it is smaller than the sum of its proper divisors (81316587200).

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

51540534400 is a wasteful number, since it uses less digits than its factorization.

51540534400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700326 (or 700309 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 51540534400 in words is "fifty-one billion, five hundred forty million, five hundred thirty-four thousand, four hundred".