646113774 has 32 divisors (see below), whose sum is σ = 1313521920. Its totient is φ = 211836800.

The previous prime is 646113751. The next prime is 646113833. The reversal of 646113774 is 477311646.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207622 + ... + 210710.

It is an arithmetic number, because the mean of its divisors is an integer number (41047560).

Almost surely, 2^646113774 is an apocalyptic number.

646113774 is an abundant number, since it is smaller than the sum of its proper divisors (667408146).

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

646113774 is a wasteful number, since it uses less digits than its factorization.

646113774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656.

The product of its digits is 84672, while the sum is 39.

The square root of 646113774 is about 25418.7681448177. The cubic root of 646113774 is about 864.5092938896.

The spelling of 646113774 in words is "six hundred forty-six million, one hundred thirteen thousand, seven hundred seventy-four".