51075918800 has 30 divisors (see below), whose sum is σ = 122709895878. Its totient is φ = 20430367360.

The previous prime is 51075918721. The next prime is 51075918809. The reversal of 51075918800 is 881957015.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11797435456 + 39278483344 = 108616^2 + 198188^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51075918809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63844499 + ... + 63845298.

Almost surely, 2^51075918800 is an apocalyptic number.

51075918800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51075918800 is an abundant number, since it is smaller than the sum of its proper divisors (71633977078).

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

51075918800 is a wasteful number, since it uses less digits than its factorization.

51075918800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127689815 (or 127689804 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 44.

The spelling of 51075918800 in words is "fifty-one billion, seventy-five million, nine hundred eighteen thousand, eight hundred".