646296356 has 6 divisors (see below), whose sum is σ = 1131018630. Its totient is φ = 323148176.

The previous prime is 646296337. The next prime is 646296379. The reversal of 646296356 is 653692646.

It can be written as a sum of positive squares in only one way, i.e., 645160000 + 1136356 = 25400^2 + 1066^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 646296356.

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 as a sum of consecutive naturals, namely, 80787041 + ... + 80787048.

It is an arithmetic number, because the mean of its divisors is an integer number (188503105).

Almost surely, 2^646296356 is an apocalyptic number.

It is an amenable number.

646296356 is a deficient number, since it is larger than the sum of its proper divisors (484722274).

646296356 is a wasteful number, since it uses less digits than its factorization.

646296356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161574093 (or 161574091 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 47.

The square root of 646296356 is about 25422.3593712307. The cubic root of 646296356 is about 864.5907186461.

The spelling of 646296356 in words is "six hundred forty-six million, two hundred ninety-six thousand, three hundred fifty-six".