646763074 has 16 divisors (see below), whose sum is σ = 987451200. Its totient is φ = 317622384.

The previous prime is 646763041. The next prime is 646763087. The reversal of 646763074 is 470367646.

It is a self number, because there is not a number n which added to its sum of digits gives 646763074.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220264 + ... + 223180.

It is an arithmetic number, because the mean of its divisors is an integer number (61715700).

Almost surely, 2^646763074 is an apocalyptic number.

646763074 is a deficient number, since it is larger than the sum of its proper divisors (340688126).

646763074 is a wasteful number, since it uses less digits than its factorization.

646763074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857.

The product of its (nonzero) digits is 508032, while the sum is 43.

The square root of 646763074 is about 25431.5369964145. The cubic root of 646763074 is about 864.7987877737.

The spelling of 646763074 in words is "six hundred forty-six million, seven hundred sixty-three thousand, seventy-four".