51204002400 has 108 divisors (see below), whose sum is σ = 180558138852. Its totient is φ = 13654398720.

The previous prime is 51204002393. The next prime is 51204002413. The reversal of 51204002400 is 420040215.

51204002400 is a `hidden beast` number, since 5 + 1 + 20 + 400 + 240 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3548634 + ... + 3563033.

It is an arithmetic number, because the mean of its divisors is an integer number (1671834619).

Almost surely, 2^51204002400 is an apocalyptic number.

51204002400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51204002400 is an abundant number, since it is smaller than the sum of its proper divisors (129354136452).

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

51204002400 is a wasteful number, since it uses less digits than its factorization.

51204002400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7111693 (or 7111677 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 51204002400 its reverse (420040215), we get a palindrome (51624042615).

The spelling of 51204002400 in words is "fifty-one billion, two hundred four million, two thousand, four hundred".