15827638791 has 4 divisors (see below), whose sum is σ = 21103518392. Its totient is φ = 10551759192.

The previous prime is 15827638753. The next prime is 15827638793. The reversal of 15827638791 is 19783672851.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 15827638791 - 2⁷ = 15827638663 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 (15827638793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2637939796 + ... + 2637939801.

It is an arithmetic number, because the mean of its divisors is an integer number (5275879598).

Almost surely, 2^15827638791 is an apocalyptic number.

15827638791 is a deficient number, since it is larger than the sum of its proper divisors (5275879601).

15827638791 is an equidigital number, since it uses as much as digits as its factorization.

15827638791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275879600.

The product of its digits is 5080320, while the sum is 57.

The spelling of 15827638791 in words is "fifteen billion, eight hundred twenty-seven million, six hundred thirty-eight thousand, seven hundred ninety-one".