51236645600 has 72 divisors (see below), whose sum is σ = 142950256848. Its totient is φ = 17566848000.

The previous prime is 51236645591. The next prime is 51236645641. The reversal of 51236645600 is 654663215.

It is a happy number.

It is a congruent 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, 4569101 + ... + 4580300.

It is an arithmetic number, because the mean of its divisors is an integer number (1985420234).

Almost surely, 2^51236645600 is an apocalyptic number.

51236645600 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51236645600 is an abundant number, since it is smaller than the sum of its proper divisors (91713611248).

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

51236645600 is a wasteful number, since it uses less digits than its factorization.

51236645600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9149428 (or 9149415 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 51236645600 in words is "fifty-one billion, two hundred thirty-six million, six hundred forty-five thousand, six hundred".