15978332159 has 8 divisors (see below), whose sum is σ = 16533646560. Its totient is φ = 15423306976.

The previous prime is 15978332137. The next prime is 15978332177. The reversal of 15978332159 is 95123387951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15978332159 - 2²⁸ = 15709896703 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 15978332159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15978332059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43262 + ... + 183924.

It is an arithmetic number, because the mean of its divisors is an integer number (2066705820).

Almost surely, 2^15978332159 is an apocalyptic number.

15978332159 is a deficient number, since it is larger than the sum of its proper divisors (555314401).

15978332159 is a wasteful number, since it uses less digits than its factorization.

15978332159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144609.

The product of its digits is 2041200, while the sum is 53.

The spelling of 15978332159 in words is "fifteen billion, nine hundred seventy-eight million, three hundred thirty-two thousand, one hundred fifty-nine".