15966780990 has 16 divisors (see below), whose sum is σ = 38320274448. Its totient is φ = 4257808256.

The previous prime is 15966780983. The next prime is 15966781031. The reversal of 15966780990 is 9908766951.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 266112987 + ... + 266113046.

It is an arithmetic number, because the mean of its divisors is an integer number (2395017153).

Almost surely, 2^15966780990 is an apocalyptic number.

15966780990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15966780990 is an abundant number, since it is smaller than the sum of its proper divisors (22353493458).

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

15966780990 is a wasteful number, since it uses less digits than its factorization.

15966780990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532226043.

The product of its (nonzero) digits is 7348320, while the sum is 60.

The spelling of 15966780990 in words is "fifteen billion, nine hundred sixty-six million, seven hundred eighty thousand, nine hundred ninety".