15505056065 has 8 divisors (see below), whose sum is σ = 18685923048. Its totient is φ = 12350807680.

The previous prime is 15505056043. The next prime is 15505056121. The reversal of 15505056065 is 56065050551.

It can be written as a sum of positive squares in 4 ways, for example, as 8042896 + 15497013169 = 2836^2 + 124487^2 .

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

It is not a de Polignac number, because 15505056065 - 2²⁰ = 15504007489 is a prime.

It is a Duffinian number.

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, 6653366 + ... + 6655695.

It is an arithmetic number, because the mean of its divisors is an integer number (2335740381).

Almost surely, 2^15505056065 is an apocalyptic number.

It is an amenable number.

15505056065 is a deficient number, since it is larger than the sum of its proper divisors (3180866983).

15505056065 is a wasteful number, since it uses less digits than its factorization.

15505056065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13309299.

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 15505056065 in words is "fifteen billion, five hundred five million, fifty-six thousand, sixty-five".