646113755 has 12 divisors (see below), whose sum is σ = 901922400. Its totient is φ = 443049264.

The previous prime is 646113751. The next prime is 646113833. The reversal of 646113755 is 557311646.

It is not a de Polignac number, because 646113755 - 2² = 646113751 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 1318355 + ... + 1318844.

It is an arithmetic number, because the mean of its divisors is an integer number (75160200).

Almost surely, 2^646113755 is an apocalyptic number.

646113755 is a deficient number, since it is larger than the sum of its proper divisors (255808645).

646113755 is a wasteful number, since it uses less digits than its factorization.

646113755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637218 (or 2637211 counting only the distinct ones).

The product of its digits is 75600, while the sum is 38.

The square root of 646113755 is about 25418.7677710781. The cubic root of 646113755 is about 864.5092854155.

The spelling of 646113755 in words is "six hundred forty-six million, one hundred thirteen thousand, seven hundred fifty-five".