646245126 has 24 divisors (see below), whose sum is σ = 1401104640. Its totient is φ = 215275536.

The previous prime is 646245101. The next prime is 646245143. The reversal of 646245126 is 621542646.

646245126 is a `hidden beast` number, since 6 + 4 + 624 + 5 + 1 + 26 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19140 + ... + 40728.

It is an arithmetic number, because the mean of its divisors is an integer number (58379360).

Almost surely, 2^646245126 is an apocalyptic number.

646245126 is an abundant number, since it is smaller than the sum of its proper divisors (754859514).

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

646245126 is a wasteful number, since it uses less digits than its factorization.

646245126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23260 (or 23257 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 646245126 is about 25421.3517736567. The cubic root of 646245126 is about 864.5678735264.

The spelling of 646245126 in words is "six hundred forty-six million, two hundred forty-five thousand, one hundred twenty-six".