326601907691 has 32 divisors (see below), whose sum is σ = 366709363200. Its totient is φ = 289058803200.

The previous prime is 326601907651. The next prime is 326601907703. The reversal of 326601907691 is 196709106623.

It is a cyclic number.

It is not a de Polignac number, because 326601907691 - 2³⁰ = 325528165867 is a prime.

It is a super-2 number, since 2×326601907691² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (326601907601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116517296 + ... + 116520098.

It is an arithmetic number, because the mean of its divisors is an integer number (11459667600).

Almost surely, 2^326601907691 is an apocalyptic number.

326601907691 is a deficient number, since it is larger than the sum of its proper divisors (40107455509).

326601907691 is a wasteful number, since it uses less digits than its factorization.

326601907691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5379.

The product of its (nonzero) digits is 734832, while the sum is 50.

The spelling of 326601907691 in words is "three hundred twenty-six billion, six hundred one million, nine hundred seven thousand, six hundred ninety-one".