15987401579 has 8 divisors (see below), whose sum is σ = 16943810688. Its totient is φ = 15032767360.

The previous prime is 15987401569. The next prime is 15987401593. The reversal of 15987401579 is 97510478951.

It is a happy number.

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 15987401579 - 2¹² = 15987397483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15987401539) 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, 425147 + ... + 461220.

It is an arithmetic number, because the mean of its divisors is an integer number (2117976336).

Almost surely, 2^15987401579 is an apocalyptic number.

15987401579 is a deficient number, since it is larger than the sum of its proper divisors (956409109).

15987401579 is a wasteful number, since it uses less digits than its factorization.

15987401579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887445.

The product of its (nonzero) digits is 3175200, while the sum is 56.

The spelling of 15987401579 in words is "fifteen billion, nine hundred eighty-seven million, four hundred one thousand, five hundred seventy-nine".