639746322022298 has 16 divisors (see below), whose sum is σ = 965388961132200. Its totient is φ = 317950854306816.

The previous prime is 639746322022273. The next prime is 639746322022303. The reversal of 639746322022298 is 892220223647936.

It can be written as a sum of positive squares in 4 ways, for example, as 304895007105049 + 334851314917249 = 17461243^2 + 18298943^2 .

It is a Curzon number.

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, 211662623 + ... + 214663826.

Almost surely, 2^{639746322022298} is an apocalyptic number.

639746322022298 is a deficient number, since it is larger than the sum of its proper divisors (325642639109902).

639746322022298 is a wasteful number, since it uses less digits than its factorization.

639746322022298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426330961.

The product of its (nonzero) digits is 188116992, while the sum is 65.

The spelling of 639746322022298 in words is "six hundred thirty-nine trillion, seven hundred forty-six billion, three hundred twenty-two million, twenty-two thousand, two hundred ninety-eight".