51845600000 has 216 divisors, whose sum is σ = 130376499120. Its totient is φ = 20574720000.

The previous prime is 51845599969. The next prime is 51845600033. The reversal of 51845600000 is 654815.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183199859 + ... + 183200141.

Almost surely, 2^51845600000 is an apocalyptic number.

51845600000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51845600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65188249560).

51845600000 is an abundant number, since it is smaller than the sum of its proper divisors (78530899120).

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

51845600000 is an frugal number, since it uses more digits than its factorization.

51845600000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 51845600000 in words is "fifty-one billion, eight hundred forty-five million, six hundred thousand".