15800788087 has 6 divisors (see below), whose sum is σ = 18380508648. Its totient is φ = 13543532604.

The previous prime is 15800788067. The next prime is 15800788111. The reversal of 15800788087 is 78088700851.

It is not a de Polignac number, because 15800788087 - 2²³ = 15792399479 is a prime.

It is a super-3 number, since 3×15800788087³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15800788007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161232483 + ... + 161232580.

It is an arithmetic number, because the mean of its divisors is an integer number (3063418108).

Almost surely, 2^15800788087 is an apocalyptic number.

15800788087 is a deficient number, since it is larger than the sum of its proper divisors (2579720561).

15800788087 is an equidigital number, since it uses as much as digits as its factorization.

15800788087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322465077 (or 322465070 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 52.

The spelling of 15800788087 in words is "fifteen billion, eight hundred million, seven hundred eighty-eight thousand, eighty-seven".