15398787841 has 4 divisors (see below), whose sum is σ = 15409186884. Its totient is φ = 15388388800.

The previous prime is 15398787829. The next prime is 15398787853. The reversal of 15398787841 is 14878789351.

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

It is an interprime number because it is at equal distance from previous prime (15398787829) and next prime (15398787853).

It can be written as a sum of positive squares in 2 ways, for example, as 2560764816 + 12838023025 = 50604^2 + 113305^2 .

It is a cyclic number.

It is not a de Polignac number, because 15398787841 - 2²⁵ = 15365233409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15398787841.

It is not an unprimeable number, because it can be changed into a prime (15398787881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5197300 + ... + 5200261.

It is an arithmetic number, because the mean of its divisors is an integer number (3852296721).

Almost surely, 2^15398787841 is an apocalyptic number.

It is an amenable number.

15398787841 is a deficient number, since it is larger than the sum of its proper divisors (10399043).

15398787841 is a wasteful number, since it uses less digits than its factorization.

15398787841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10399042.

The product of its digits is 13547520, while the sum is 61.

The spelling of 15398787841 in words is "fifteen billion, three hundred ninety-eight million, seven hundred eighty-seven thousand, eight hundred forty-one".