53391405636 has 60 divisors (see below), whose sum is σ = 142209229932. Its totient is φ = 17461334592.

The previous prime is 53391405553. The next prime is 53391405643. The reversal of 53391405636 is 63650419335.

53391405636 is a `hidden beast` number, since 5 + 3 + 3 + 9 + 1 + 4 + 0 + 5 + 636 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39668688900 + 13722716736 = 199170^2 + 117144^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53391405591 and 53391405600.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1537435 + ... + 1571778.

Almost surely, 2^53391405636 is an apocalyptic number.

It is an amenable number.

53391405636 is an abundant number, since it is smaller than the sum of its proper divisors (88817824296).

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

53391405636 is a wasteful number, since it uses less digits than its factorization.

53391405636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109282 (or 3109271 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 45.

The spelling of 53391405636 in words is "fifty-three billion, three hundred ninety-one million, four hundred five thousand, six hundred thirty-six".