2117640045 has 16 divisors (see below), whose sum is σ = 3389061312. Its totient is φ = 1129128960.

The previous prime is 2117640029. The next prime is 2117640047. The reversal of 2117640045 is 5400467112.

It is not a de Polignac number, because 2117640045 - 2⁴ = 2117640029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2117639994 and 2117640021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117640047) 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, 54990 + ... + 85200.

It is an arithmetic number, because the mean of its divisors is an integer number (211816332).

Almost surely, 2^2117640045 is an apocalyptic number.

It is an amenable number.

2117640045 is a deficient number, since it is larger than the sum of its proper divisors (1271421267).

2117640045 is a wasteful number, since it uses less digits than its factorization.

2117640045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34892.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2117640045 is about 46017.8231232204. The cubic root of 2117640045 is about 1284.1548025963.

The spelling of 2117640045 in words is "two billion, one hundred seventeen million, six hundred forty thousand, forty-five".