2145612605 has 16 divisors (see below), whose sum is σ = 2606926464. Its totient is φ = 1695163200.

The previous prime is 2145612593. The next prime is 2145612643. The reversal of 2145612605 is 5062165412.

It is not a de Polignac number, because 2145612605 - 2²⁴ = 2128835389 is a prime.

It is a Duffinian number.

It is a congruent 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, 122402 + ... + 138828.

It is an arithmetic number, because the mean of its divisors is an integer number (162932904).

Almost surely, 2^2145612605 is an apocalyptic number.

It is an amenable number.

2145612605 is a deficient number, since it is larger than the sum of its proper divisors (461313859).

2145612605 is a wasteful number, since it uses less digits than its factorization.

2145612605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16756.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2145612605 is about 46320.7578197939. The cubic root of 2145612605 is about 1289.7843529117.

The spelling of 2145612605 in words is "two billion, one hundred forty-five million, six hundred twelve thousand, six hundred five".