51511503040 has 112 divisors (see below), whose sum is σ = 124558836480. Its totient is φ = 20288240640.

The previous prime is 51511502983. The next prime is 51511503053. The reversal of 51511503040 is 4030511515.

It is a happy number.

51511503040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51511502996 and 51511503014.

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, 5895475 + ... + 5904205.

Almost surely, 2^51511503040 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 51511503040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62279418240).

51511503040 is an abundant number, since it is smaller than the sum of its proper divisors (73047333440).

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

51511503040 is a wasteful number, since it uses less digits than its factorization.

51511503040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030 (or 9020 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 51511503040 in words is "fifty-one billion, five hundred eleven million, five hundred three thousand, forty".