15439154874361 has 3 divisors (see below), whose sum is σ = 15439158803631. Its totient is φ = 15439150945092.

The previous prime is 15439154874329. The next prime is 15439154874373. The reversal of 15439154874361 is 16347845193451.

The square root of 15439154874361 is 3929269.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 5969133398761 + 9470021475600 = 2443181^2 + 3077340^2 .

It is not a de Polignac number, because 15439154874361 - 2⁵ = 15439154874329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15439154874361.

It is not an unprimeable number, because it can be changed into a prime (15439154874461) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1964635 + ... + 5893903.

It is an arithmetic number, because the mean of its divisors is an integer number (5146386267877).

Almost surely, 2^{15439154874361} is an apocalyptic number.

15439154874361 is the 3929269-th square number.

15439154874361 is the 1964635-th centered octagonal number.

It is an amenable number.

15439154874361 is a deficient number, since it is larger than the sum of its proper divisors (3929270).

15439154874361 is an frugal number, since it uses more digits than its factorization.

15439154874361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7858538 (or 3929269 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 61.

The spelling of 15439154874361 in words is "fifteen trillion, four hundred thirty-nine billion, one hundred fifty-four million, eight hundred seventy-four thousand, three hundred sixty-one".