2646689545 has 8 divisors (see below), whose sum is σ = 3206863296. Its totient is φ = 2096794416.

The previous prime is 2646689527. The next prime is 2646689623. The reversal of 2646689545 is 5459866462.

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

It is a cyclic number.

It is not a de Polignac number, because 2646689545 - 2²³ = 2638300937 is a prime.

It is a super-2 number, since 2×2646689545² = 14009931095224614050, which contains 22 as substring.

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, 2569087 + ... + 2570116.

It is an arithmetic number, because the mean of its divisors is an integer number (400857912).

Almost surely, 2^2646689545 is an apocalyptic number.

It is an amenable number.

2646689545 is a deficient number, since it is larger than the sum of its proper divisors (560173751).

2646689545 is a wasteful number, since it uses less digits than its factorization.

2646689545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5139311.

The product of its digits is 12441600, while the sum is 55.

The square root of 2646689545 is about 51445.9866753472. The cubic root of 2646689545 is about 1383.2510246990.

The spelling of 2646689545 in words is "two billion, six hundred forty-six million, six hundred eighty-nine thousand, five hundred forty-five".