2165994974 has 16 divisors (see below), whose sum is σ = 3816998640. Its totient is φ = 908808960.

The previous prime is 2165994923. The next prime is 2165994977. The reversal of 2165994974 is 4794995612.

2165994974 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165994977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3786419 + ... + 3786990.

It is an arithmetic number, because the mean of its divisors is an integer number (238562415).

Almost surely, 2^2165994974 is an apocalyptic number.

2165994974 is a deficient number, since it is larger than the sum of its proper divisors (1651003666).

2165994974 is a wasteful number, since it uses less digits than its factorization.

2165994974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7573435.

The product of its digits is 4898880, while the sum is 56.

The square root of 2165994974 is about 46540.2511166410. The cubic root of 2165994974 is about 1293.8556148806.

The spelling of 2165994974 in words is "two billion, one hundred sixty-five million, nine hundred ninety-four thousand, nine hundred seventy-four".