918646005505 has 12 divisors (see below), whose sum is σ = 1113397939836. Its totient is φ = 727640360000.

The previous prime is 918646005493. The next prime is 918646005533. The reversal of 918646005505 is 505500646819.

918646005505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 17612209521 + 901033795984 = 132711^2 + 949228^2 .

It is not a de Polignac number, because 918646005505 - 2²⁵ = 918612451073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8954446 + ... + 9056455.

It is an arithmetic number, because the mean of its divisors is an integer number (92783161653).

Almost surely, 2^918646005505 is an apocalyptic number.

It is an amenable number.

918646005505 is a deficient number, since it is larger than the sum of its proper divisors (194751934331).

918646005505 is a wasteful number, since it uses less digits than its factorization.

918646005505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18011108 (or 18011007 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 49.

The spelling of 918646005505 in words is "nine hundred eighteen billion, six hundred forty-six million, five thousand, five hundred five".