1648636089 has 16 divisors (see below), whose sum is σ = 2224676160. Its totient is φ = 1085863680.

The previous prime is 1648636063. The next prime is 1648636123. The reversal of 1648636089 is 9806368461.

It is not a de Polignac number, because 1648636089 - 2⁵ = 1648636057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1648636019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607674 + ... + 610380.

It is an arithmetic number, because the mean of its divisors is an integer number (139042260).

Almost surely, 2^1648636089 is an apocalyptic number.

It is an amenable number.

1648636089 is a deficient number, since it is larger than the sum of its proper divisors (576040071).

1648636089 is a wasteful number, since it uses less digits than its factorization.

1648636089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 1648636089 is about 40603.3999684755. The cubic root of 1648636089 is about 1181.3400673968.

The spelling of 1648636089 in words is "one billion, six hundred forty-eight million, six hundred thirty-six thousand, eighty-nine".