329138991999 has 16 divisors (see below), whose sum is σ = 488185000800. Its totient is φ = 219168739008.

The previous prime is 329138991971. The next prime is 329138992027. The reversal of 329138991999 is 999199831923.

It is an interprime number because it is at equal distance from previous prime (329138991971) and next prime (329138992027).

It is not a de Polignac number, because 329138991999 - 2⁷ = 329138991871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329138991899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7122534 + ... + 7168595.

It is an arithmetic number, because the mean of its divisors is an integer number (30511562550).

Almost surely, 2^329138991999 is an apocalyptic number.

329138991999 is a deficient number, since it is larger than the sum of its proper divisors (159046008801).

329138991999 is a wasteful number, since it uses less digits than its factorization.

329138991999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14291991 (or 14291985 counting only the distinct ones).

The product of its digits is 76527504, while the sum is 72.

The spelling of 329138991999 in words is "three hundred twenty-nine billion, one hundred thirty-eight million, nine hundred ninety-one thousand, nine hundred ninety-nine".