326640506402 has 32 divisors (see below), whose sum is σ = 579797637120. Its totient is φ = 135037062720.

The previous prime is 326640506393. The next prime is 326640506453. The reversal of 326640506402 is 204605046623.

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, 71252 + ... + 811392.

It is an arithmetic number, because the mean of its divisors is an integer number (18118676160).

Almost surely, 2^326640506402 is an apocalyptic number.

326640506402 is a deficient number, since it is larger than the sum of its proper divisors (253157130718).

326640506402 is a wasteful number, since it uses less digits than its factorization.

326640506402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741266.

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 326640506402 in words is "three hundred twenty-six billion, six hundred forty million, five hundred six thousand, four hundred two".