2164747905 has 24 divisors (see below), whose sum is σ = 3754662912. Its totient is φ = 1153783584.

The previous prime is 2164747903. The next prime is 2164747943. The reversal of 2164747905 is 5097474612.

It is not a de Polignac number, because 2164747905 - 2¹ = 2164747903 is a prime.

It is a super-2 number, since 2×2164747905² = 9372266984403778050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2164747901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58432 + ... + 87998.

It is an arithmetic number, because the mean of its divisors is an integer number (156444288).

Almost surely, 2^2164747905 is an apocalyptic number.

It is an amenable number.

2164747905 is a deficient number, since it is larger than the sum of its proper divisors (1589915007).

2164747905 is a wasteful number, since it uses less digits than its factorization.

2164747905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31205 (or 31202 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 2164747905 is about 46526.8514408615. The cubic root of 2164747905 is about 1293.6072552725.

The spelling of 2164747905 in words is "two billion, one hundred sixty-four million, seven hundred forty-seven thousand, nine hundred five".