2168749642 has 8 divisors (see below), whose sum is σ = 3424341600. Its totient is φ = 1027302444.

The previous prime is 2168749637. The next prime is 2168749643. The reversal of 2168749642 is 2469478612.

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

It is not an unprimeable number, because it can be changed into a prime (2168749643) 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, 28536142 + ... + 28536217.

It is an arithmetic number, because the mean of its divisors is an integer number (428042700).

Almost surely, 2^2168749642 is an apocalyptic number.

2168749642 is a deficient number, since it is larger than the sum of its proper divisors (1255591958).

2168749642 is a wasteful number, since it uses less digits than its factorization.

2168749642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57072380.

The product of its digits is 1161216, while the sum is 49.

The square root of 2168749642 is about 46569.8361818033. The cubic root of 2168749642 is about 1294.4038822025.

The spelling of 2168749642 in words is "two billion, one hundred sixty-eight million, seven hundred forty-nine thousand, six hundred forty-two".