15974139769745 has 8 divisors (see below), whose sum is σ = 19168998203880. Its totient is φ = 12779291495680.

The previous prime is 15974139769717. The next prime is 15974139769759. The reversal of 15974139769745 is 54796793147951.

15974139769745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6843100228624 + 9131039541121 = 2615932^2 + 3021761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15974139769745 - 2²⁰ = 15974138721169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1504361 + ... + 5849049.

It is an arithmetic number, because the mean of its divisors is an integer number (2396124775485).

Almost surely, 2^{15974139769745} is an apocalyptic number.

It is an amenable number.

15974139769745 is a deficient number, since it is larger than the sum of its proper divisors (3194858434135).

15974139769745 is an equidigital number, since it uses as much as digits as its factorization.

15974139769745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080035.

The product of its digits is 1800338400, while the sum is 77.

The spelling of 15974139769745 in words is "fifteen trillion, nine hundred seventy-four billion, one hundred thirty-nine million, seven hundred sixty-nine thousand, seven hundred forty-five".