15116640243 has 4 divisors (see below), whose sum is σ = 20155520328. Its totient is φ = 10077760160.

The previous prime is 15116640233. The next prime is 15116640269. The reversal of 15116640243 is 34204661151.

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 15116640243 - 2¹⁸ = 15116378099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15116640233) 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, 2519440038 + ... + 2519440043.

It is an arithmetic number, because the mean of its divisors is an integer number (5038880082).

Almost surely, 2^15116640243 is an apocalyptic number.

15116640243 is a deficient number, since it is larger than the sum of its proper divisors (5038880085).

15116640243 is an equidigital number, since it uses as much as digits as its factorization.

15116640243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038880084.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 15116640243 in words is "fifteen billion, one hundred sixteen million, six hundred forty thousand, two hundred forty-three".