51142902160 has 80 divisors (see below), whose sum is σ = 136155606912. Its totient is φ = 17500953600.

The previous prime is 51142902157. The next prime is 51142902191. The reversal of 51142902160 is 6120924115.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204115 + ... + 379405.

Almost surely, 2^51142902160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51142902160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68077803456).

51142902160 is an abundant number, since it is smaller than the sum of its proper divisors (85012704752).

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

51142902160 is a wasteful number, since it uses less digits than its factorization.

51142902160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175832 (or 175826 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 51142902160 in words is "fifty-one billion, one hundred forty-two million, nine hundred two thousand, one hundred sixty".