15580380387 has 32 divisors (see below), whose sum is σ = 24642648576. Its totient is φ = 8631648000.

The previous prime is 15580380341. The next prime is 15580380391. The reversal of 15580380387 is 78308308551.

It is a happy number.

It is not a de Polignac number, because 15580380387 - 2²⁶ = 15513271523 is a prime.

It is a super-2 number, since 2×15580380387² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15580380307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132114 + ... + 220487.

It is an arithmetic number, because the mean of its divisors is an integer number (770082768).

Almost surely, 2^15580380387 is an apocalyptic number.

15580380387 is a deficient number, since it is larger than the sum of its proper divisors (9062268189).

15580380387 is a wasteful number, since it uses less digits than its factorization.

15580380387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352731.

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 15580380387 in words is "fifteen billion, five hundred eighty million, three hundred eighty thousand, three hundred eighty-seven".