15240140989 has 4 divisors (see below), whose sum is σ = 15249123324. Its totient is φ = 15231158656.

The previous prime is 15240140953. The next prime is 15240140999. The reversal of 15240140989 is 98904104251.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9113948089 + 6126192900 = 95467^2 + 78270^2 .

It is a cyclic number.

It is not a de Polignac number, because 15240140989 - 2⁹ = 15240140477 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 (15240140999) 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, 4488622 + ... + 4492015.

It is an arithmetic number, because the mean of its divisors is an integer number (3812280831).

Almost surely, 2^15240140989 is an apocalyptic number.

It is an amenable number.

15240140989 is a deficient number, since it is larger than the sum of its proper divisors (8982335).

15240140989 is an equidigital number, since it uses as much as digits as its factorization.

15240140989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8982334.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 15240140989 in words is "fifteen billion, two hundred forty million, one hundred forty thousand, nine hundred eighty-nine".