15140746657979 has 4 divisors (see below), whose sum is σ = 15162345441360. Its totient is φ = 15119147874600.

The previous prime is 15140746657951. The next prime is 15140746657991. The reversal of 15140746657979 is 97975664704151.

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 15140746657979 - 2¹⁶ = 15140746592443 is a prime.

It is a super-2 number, since 2×15140746657979² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15140746657579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10799390639 + ... + 10799392040.

It is an arithmetic number, because the mean of its divisors is an integer number (3790586360340).

Almost surely, 2^{15140746657979} is an apocalyptic number.

15140746657979 is a deficient number, since it is larger than the sum of its proper divisors (21598783381).

15140746657979 is an equidigital number, since it uses as much as digits as its factorization.

15140746657979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21598783380.

The product of its (nonzero) digits is 400075200, while the sum is 71.

The spelling of 15140746657979 in words is "fifteen trillion, one hundred forty billion, seven hundred forty-six million, six hundred fifty-seven thousand, nine hundred seventy-nine".