104001239991 has 32 divisors (see below), whose sum is σ = 154210625280. Its totient is φ = 61808947200.

The previous prime is 104001239981. The next prime is 104001239999. The reversal of 104001239991 is 199932100401.

It is not a de Polignac number, because 104001239991 - 2⁹ = 104001239479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104001239999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3502455 + ... + 3532023.

It is an arithmetic number, because the mean of its divisors is an integer number (4819082040).

Almost surely, 2^104001239991 is an apocalyptic number.

104001239991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

104001239991 is a deficient number, since it is larger than the sum of its proper divisors (50209385289).

104001239991 is a wasteful number, since it uses less digits than its factorization.

104001239991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31647.

The product of its (nonzero) digits is 17496, while the sum is 39.

The spelling of 104001239991 in words is "one hundred four billion, one million, two hundred thirty-nine thousand, nine hundred ninety-one".