15982779803616 has 36 divisors (see below), whose sum is σ = 45451030067352. Its totient is φ = 5327593267776.

The previous prime is 15982779803561. The next prime is 15982779803699. The reversal of 15982779803616 is 61630897728951.

15982779803616 is a `hidden beast` number, since 1 + 598 + 27 + 7 + 9 + 8 + 0 + 3 + 6 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (72).

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 5 ways as a sum of consecutive naturals, for example, 27747881316 + ... + 27747881891.

It is an arithmetic number, because the mean of its divisors is an integer number (1262528612982).

Almost surely, 2^{15982779803616} is an apocalyptic number.

15982779803616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15982779803616 is an abundant number, since it is smaller than the sum of its proper divisors (29468250263736).

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

15982779803616 is a wasteful number, since it uses less digits than its factorization.

15982779803616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55495763223 (or 55495763212 counting only the distinct ones).

The product of its (nonzero) digits is 274337280, while the sum is 72.

The spelling of 15982779803616 in words is "fifteen trillion, nine hundred eighty-two billion, seven hundred seventy-nine million, eight hundred three thousand, six hundred sixteen".