15565473241 has 12 divisors (see below), whose sum is σ = 16655684508. Its totient is φ = 14542886912.

The previous prime is 15565473239. The next prime is 15565473281. The reversal of 15565473241 is 14237456551.

It can be written as a sum of positive squares in 6 ways, for example, as 1044259225 + 14521214016 = 32315^2 + 120504^2 .

It is not a de Polignac number, because 15565473241 - 2¹ = 15565473239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15565473211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156976 + ... + 236161.

It is an arithmetic number, because the mean of its divisors is an integer number (1387973709).

Almost surely, 2^15565473241 is an apocalyptic number.

It is an amenable number.

15565473241 is a deficient number, since it is larger than the sum of its proper divisors (1090211267).

15565473241 is a wasteful number, since it uses less digits than its factorization.

15565473241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393308 (or 393291 counting only the distinct ones).

The product of its digits is 504000, while the sum is 43.

The spelling of 15565473241 in words is "fifteen billion, five hundred sixty-five million, four hundred seventy-three thousand, two hundred forty-one".