15609813466 has 24 divisors (see below), whose sum is σ = 26359884180. Its totient is φ = 6891282816.

The previous prime is 15609813433. The next prime is 15609813473. The reversal of 15609813466 is 66431890651.

It can be written as a sum of positive squares in 2 ways, for example, as 15557323441 + 52490025 = 124729^2 + 7245^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553711 + ... + 581218.

Almost surely, 2^15609813466 is an apocalyptic number.

15609813466 is a deficient number, since it is larger than the sum of its proper divisors (10750070714).

15609813466 is a wasteful number, since it uses less digits than its factorization.

15609813466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134990 (or 1134967 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 15609813466 in words is "fifteen billion, six hundred nine million, eight hundred thirteen thousand, four hundred sixty-six".