51623311400 has 72 divisors (see below), whose sum is σ = 125469788430. Its totient is φ = 19751487360.

The previous prime is 51623311387. The next prime is 51623311417. The reversal of 51623311400 is 411332615.

It can be written as a sum of positive squares in 3 ways, for example, as 49958508196 + 1664803204 = 223514^2 + 40802^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51623311400.

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, 138167 + ... + 349766.

Almost surely, 2^51623311400 is an apocalyptic number.

51623311400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51623311400 is an abundant number, since it is smaller than the sum of its proper divisors (73846477030).

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

51623311400 is a wasteful number, since it uses less digits than its factorization.

51623311400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487995 (or 487963 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 51623311400 in words is "fifty-one billion, six hundred twenty-three million, three hundred eleven thousand, four hundred".