2168737461 has 24 divisors (see below), whose sum is σ = 3458591136. Its totient is φ = 1298545440.

The previous prime is 2168737457. The next prime is 2168737469. The reversal of 2168737461 is 1647378612.

2168737461 is a `hidden beast` number, since 216 + 8 + 7 + 374 + 61 = 666.

It is not a de Polignac number, because 2168737461 - 2² = 2168737457 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2168737469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123750 + ... + 140183.

It is an arithmetic number, because the mean of its divisors is an integer number (144107964).

Almost surely, 2^2168737461 is an apocalyptic number.

It is an amenable number.

2168737461 is a deficient number, since it is larger than the sum of its proper divisors (1289853675).

2168737461 is a wasteful number, since it uses less digits than its factorization.

2168737461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264033 (or 264030 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 2168737461 is about 46569.7053995406. The cubic root of 2168737461 is about 1294.4014588149.

The spelling of 2168737461 in words is "two billion, one hundred sixty-eight million, seven hundred thirty-seven thousand, four hundred sixty-one".