2161274895 has 96 divisors (see below), whose sum is σ = 4278403584. Its totient is φ = 1001548800.

The previous prime is 2161274893. The next prime is 2161274897. The reversal of 2161274895 is 5984721612.

2161274895 is a `hidden beast` number, since 2 + 161 + 2 + 7 + 489 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (2161274893) and next prime (2161274897).

It is not a de Polignac number, because 2161274895 - 2¹ = 2161274893 is a prime.

It is a super-2 number, since 2×2161274895² = 9342218343514522050, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2161274895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161274891) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 669385 + ... + 672605.

It is an arithmetic number, because the mean of its divisors is an integer number (44566704).

Almost surely, 2^2161274895 is an apocalyptic number.

2161274895 is a deficient number, since it is larger than the sum of its proper divisors (2117128689).

2161274895 is a wasteful number, since it uses less digits than its factorization.

2161274895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313 (or 3310 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 2161274895 is about 46489.5138176342. The cubic root of 2161274895 is about 1292.9150860378.

The spelling of 2161274895 in words is "two billion, one hundred sixty-one million, two hundred seventy-four thousand, eight hundred ninety-five".