6405136536 has 32 divisors (see below), whose sum is σ = 16114843440. Its totient is φ = 2121445248.

The previous prime is 6405136511. The next prime is 6405136553. The reversal of 6405136536 is 6356315046.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6405136494 and 6405136503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846171 + ... + 853706.

Almost surely, 2^6405136536 is an apocalyptic number.

It is an amenable number.

6405136536 is an abundant number, since it is smaller than the sum of its proper divisors (9709706904).

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

6405136536 is a wasteful number, since it uses less digits than its factorization.

6405136536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700043 (or 1700039 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 6405136536 is about 80032.0969111768. The cubic root of 6405136536 is about 1857.1321024590.

The spelling of 6405136536 in words is "six billion, four hundred five million, one hundred thirty-six thousand, five hundred thirty-six".