51040900512 has 144 divisors (see below), whose sum is σ = 166203535680. Its totient is φ = 14554930176.

The previous prime is 51040900499. The next prime is 51040900577. The reversal of 51040900512 is 21500904015.

It is a tau number, because it is divible by the number of its divisors (144).

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, 1030164 + ... + 1078572.

It is an arithmetic number, because the mean of its divisors is an integer number (1154191220).

Almost surely, 2^51040900512 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 51040900512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83101767840).

51040900512 is an abundant number, since it is smaller than the sum of its proper divisors (115162635168).

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

51040900512 is a wasteful number, since it uses less digits than its factorization.

51040900512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48955 (or 48944 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 51040900512 in words is "fifty-one billion, forty million, nine hundred thousand, five hundred twelve".