51970478400 has 126 divisors (see below), whose sum is σ = 184715402222. Its totient is φ = 13858790400.

The previous prime is 51970478381. The next prime is 51970478491. The reversal of 51970478400 is 487407915.

It is a happy number.

51970478400 is a `hidden beast` number, since 51 + 97 + 0 + 478 + 40 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 4784212224 + 47186266176 = 69168^2 + 217224^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 1790131 + ... + 1818930.

Almost surely, 2^51970478400 is an apocalyptic number.

51970478400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51970478400 is an abundant number, since it is smaller than the sum of its proper divisors (132744923822).

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

51970478400 is a wasteful number, since it uses less digits than its factorization.

51970478400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609089 (or 3609071 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 51970478400 in words is "fifty-one billion, nine hundred seventy million, four hundred seventy-eight thousand, four hundred".