15438848987 has 16 divisors (see below), whose sum is σ = 16086470400. Its totient is φ = 14799190560.

The previous prime is 15438848977. The next prime is 15438848989. The reversal of 15438848987 is 78984883451.

It is a cyclic number.

It is not a de Polignac number, because 15438848987 - 2⁸ = 15438848731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15438848989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3771812 + ... + 3775902.

It is an arithmetic number, because the mean of its divisors is an integer number (1005404400).

Almost surely, 2^15438848987 is an apocalyptic number.

15438848987 is a deficient number, since it is larger than the sum of its proper divisors (647621413).

15438848987 is a wasteful number, since it uses less digits than its factorization.

15438848987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026.

The product of its digits is 61931520, while the sum is 65.

The spelling of 15438848987 in words is "fifteen billion, four hundred thirty-eight million, eight hundred forty-eight thousand, nine hundred eighty-seven".