6440356574136 has 32 divisors (see below), whose sum is σ = 17889879373200. Its totient is φ = 2146785524640.

The previous prime is 6440356574117. The next prime is 6440356574189. The reversal of 6440356574136 is 6314756530446.

6440356574136 is a `hidden beast` number, since 6 + 4 + 4 + 0 + 3 + 56 + 574 + 13 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14908232595 + ... + 14908233026.

Almost surely, 2^{6440356574136} is an apocalyptic number.

It is an amenable number.

6440356574136 is an abundant number, since it is smaller than the sum of its proper divisors (11449522799064).

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

6440356574136 is a wasteful number, since it uses less digits than its factorization.

6440356574136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29816465636 (or 29816465626 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 54.

The spelling of 6440356574136 in words is "six trillion, four hundred forty billion, three hundred fifty-six million, five hundred seventy-four thousand, one hundred thirty-six".