15010000991 has 4 divisors (see below), whose sum is σ = 15019377984. Its totient is φ = 15000624000.

The previous prime is 15010000921. The next prime is 15010001003. The reversal of 15010000991 is 19900001051.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15010000991 - 2¹⁰ = 15009999967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15010000991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15010000921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4686095 + ... + 4689296.

It is an arithmetic number, because the mean of its divisors is an integer number (3754844496).

Almost surely, 2^15010000991 is an apocalyptic number.

15010000991 is a deficient number, since it is larger than the sum of its proper divisors (9376993).

15010000991 is an equidigital number, since it uses as much as digits as its factorization.

15010000991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9376992.

The product of its (nonzero) digits is 405, while the sum is 26.

The spelling of 15010000991 in words is "fifteen billion, ten million, nine hundred ninety-one", and thus it is an aban number.