51013635420 has 96 divisors (see below), whose sum is σ = 164024743680. Its totient is φ = 11716047360.

The previous prime is 51013635403. The next prime is 51013635461. The reversal of 51013635420 is 2453631015.

51013635420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2021497 + ... + 2046576.

It is an arithmetic number, because the mean of its divisors is an integer number (1708591080).

Almost surely, 2^51013635420 is an apocalyptic number.

It is an amenable number.

51013635420 is an abundant number, since it is smaller than the sum of its proper divisors (113011108260).

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

51013635420 is a wasteful number, since it uses less digits than its factorization.

51013635420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068115 (or 4068113 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 51013635420 in words is "fifty-one billion, thirteen million, six hundred thirty-five thousand, four hundred twenty".