15505552435505 has 16 divisors (see below), whose sum is σ = 20298281828544. Its totient is φ = 11276707577280.

The previous prime is 15505552435453. The next prime is 15505552435511. The reversal of 15505552435505 is 50553425550551.

It is a happy number.

15505552435505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15505552435505 - 2¹² = 15505552431409 is a prime.

It is a Duffinian number.

It is a Curzon 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, 12171602 + ... + 13385028.

It is an arithmetic number, because the mean of its divisors is an integer number (1268642614284).

Almost surely, 2^{15505552435505} is an apocalyptic number.

It is an amenable number.

15505552435505 is a deficient number, since it is larger than the sum of its proper divisors (4792729393039).

15505552435505 is a wasteful number, since it uses less digits than its factorization.

15505552435505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445776.

The product of its (nonzero) digits is 9375000, while the sum is 50.

The spelling of 15505552435505 in words is "fifteen trillion, five hundred five billion, five hundred fifty-two million, four hundred thirty-five thousand, five hundred five".