15440036243 has 4 divisors (see below), whose sum is σ = 15440822760. Its totient is φ = 15439249728.

The previous prime is 15440036237. The next prime is 15440036333. The reversal of 15440036243 is 34263004451.

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

It is a cyclic number.

It is not a de Polignac number, because 15440036243 - 2³⁰ = 14366294419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15440036203) 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, 363038 + ... + 403331.

It is an arithmetic number, because the mean of its divisors is an integer number (3860205690).

Almost surely, 2^15440036243 is an apocalyptic number.

15440036243 is a deficient number, since it is larger than the sum of its proper divisors (786517).

15440036243 is an equidigital number, since it uses as much as digits as its factorization.

15440036243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786516.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 15440036243 in words is "fifteen billion, four hundred forty million, thirty-six thousand, two hundred forty-three".