51165397700 has 72 divisors (see below), whose sum is σ = 114690825984. Its totient is φ = 19792080000.

The previous prime is 51165397693. The next prime is 51165397741. The reversal of 51165397700 is 779356115.

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, 5162750 + ... + 5172650.

Almost surely, 2^51165397700 is an apocalyptic number.

51165397700 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 51165397700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57345412992).

51165397700 is an abundant number, since it is smaller than the sum of its proper divisors (63525428284).

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

51165397700 is a wasteful number, since it uses less digits than its factorization.

51165397700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11613 (or 11606 counting only the distinct ones).

The product of its (nonzero) digits is 198450, while the sum is 44.

The spelling of 51165397700 in words is "fifty-one billion, one hundred sixty-five million, three hundred ninety-seven thousand, seven hundred".