646113756 has 12 divisors (see below), whose sum is σ = 1507598792. Its totient is φ = 215371248.

The previous prime is 646113751. The next prime is 646113833. The reversal of 646113756 is 657311646.

646113756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646113751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26921395 + ... + 26921418.

Almost surely, 2^646113756 is an apocalyptic number.

It is an amenable number.

646113756 is an abundant number, since it is smaller than the sum of its proper divisors (861485036).

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

646113756 is a wasteful number, since it uses less digits than its factorization.

646113756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53842820 (or 53842818 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 646113756 is about 25418.7677907486. The cubic root of 646113756 is about 864.5092858615.

The spelling of 646113756 in words is "six hundred forty-six million, one hundred thirteen thousand, seven hundred fifty-six".