15556242265 has 16 divisors (see below), whose sum is σ = 19331526096. Its totient is φ = 12010003200.

The previous prime is 15556242259. The next prime is 15556242283. The reversal of 15556242265 is 56224265551.

It can be written as a sum of positive squares in 8 ways, for example, as 3018513481 + 12537728784 = 54941^2 + 111972^2 .

It is not a de Polignac number, because 15556242265 - 2¹⁵ = 15556209497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465006 + ... + 497335.

It is an arithmetic number, because the mean of its divisors is an integer number (1208220381).

Almost surely, 2^15556242265 is an apocalyptic number.

It is an amenable number.

15556242265 is a deficient number, since it is larger than the sum of its proper divisors (3775283831).

15556242265 is an equidigital number, since it uses as much as digits as its factorization.

15556242265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962460.

The product of its digits is 720000, while the sum is 43.

The spelling of 15556242265 in words is "fifteen billion, five hundred fifty-six million, two hundred forty-two thousand, two hundred sixty-five".