51235015660 has 24 divisors (see below), whose sum is σ = 107597795760. Its totient is φ = 20493194304.

The previous prime is 51235015651. The next prime is 51235015673. The reversal of 51235015660 is 6651053215.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913962 + ... + 968398.

It is an arithmetic number, because the mean of its divisors is an integer number (4483241490).

Almost surely, 2^51235015660 is an apocalyptic number.

It is an amenable number.

51235015660 is an abundant number, since it is smaller than the sum of its proper divisors (56362780100).

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

51235015660 is a wasteful number, since it uses less digits than its factorization.

51235015660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101505 (or 101503 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

Adding to 51235015660 its reverse (6651053215), we get a palindrome (57886068875).

The spelling of 51235015660 in words is "fifty-one billion, two hundred thirty-five million, fifteen thousand, six hundred sixty".