15504550087 has 12 divisors (see below), whose sum is σ = 17253216120. Its totient is φ = 13850207280.

The previous prime is 15504550063. The next prime is 15504550091. The reversal of 15504550087 is 78005540551.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-15504550087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15504550007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608037 + ... + 633022.

It is an arithmetic number, because the mean of its divisors is an integer number (1437768010).

Almost surely, 2^15504550087 is an apocalyptic number.

15504550087 is a deficient number, since it is larger than the sum of its proper divisors (1748666033).

15504550087 is a wasteful number, since it uses less digits than its factorization.

15504550087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241134 (or 1241103 counting only the distinct ones).

The product of its (nonzero) digits is 140000, while the sum is 40.

The spelling of 15504550087 in words is "fifteen billion, five hundred four million, five hundred fifty thousand, eighty-seven".