2164734761 has 4 divisors (see below), whose sum is σ = 2473982592. Its totient is φ = 1855486932.

The previous prime is 2164734749. The next prime is 2164734799. The reversal of 2164734761 is 1674374612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2164734761 - 2²² = 2160540457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2164734701) 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 3 ways as a sum of consecutive naturals, for example, 154623905 + ... + 154623918.

It is an arithmetic number, because the mean of its divisors is an integer number (618495648).

Almost surely, 2^2164734761 is an apocalyptic number.

It is an amenable number.

2164734761 is a deficient number, since it is larger than the sum of its proper divisors (309247831).

2164734761 is an equidigital number, since it uses as much as digits as its factorization.

2164734761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309247830.

The product of its digits is 169344, while the sum is 41.

The square root of 2164734761 is about 46526.7101888797. The cubic root of 2164734761 is about 1293.6046370757.

The spelling of 2164734761 in words is "two billion, one hundred sixty-four million, seven hundred thirty-four thousand, seven hundred sixty-one".