15991480974 has 16 divisors (see below), whose sum is σ = 36551956608. Its totient is φ = 4568994552.

The previous prime is 15991480949. The next prime is 15991480997. The reversal of 15991480974 is 47908419951.

15991480974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190374732 + ... + 190374815.

It is an arithmetic number, because the mean of its divisors is an integer number (2284497288).

Almost surely, 2^15991480974 is an apocalyptic number.

15991480974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

15991480974 is an abundant number, since it is smaller than the sum of its proper divisors (20560475634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15991480974 is a wasteful number, since it uses less digits than its factorization.

15991480974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380749559.

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 15991480974 in words is "fifteen billion, nine hundred ninety-one million, four hundred eighty thousand, nine hundred seventy-four".