2161268747 has 8 divisors (see below), whose sum is σ = 2358097392. Its totient is φ = 1964498400.

The previous prime is 2161268731. The next prime is 2161268783. The reversal of 2161268747 is 7478621612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2161268747 - 2⁴ = 2161268731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2161268698 and 2161268707.

It is not an unprimeable number, because it can be changed into a prime (2161268717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107297 + ... + 125837.

It is an arithmetic number, because the mean of its divisors is an integer number (294762174).

Almost surely, 2^2161268747 is an apocalyptic number.

2161268747 is a deficient number, since it is larger than the sum of its proper divisors (196828645).

2161268747 is a wasteful number, since it uses less digits than its factorization.

2161268747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29149.

The product of its digits is 225792, while the sum is 44.

The square root of 2161268747 is about 46489.4476951491. The cubic root of 2161268747 is about 1292.9138600871.

The spelling of 2161268747 in words is "two billion, one hundred sixty-one million, two hundred sixty-eight thousand, seven hundred forty-seven".