2161793494 has 16 divisors (see below), whose sum is σ = 3825478656. Its totient is φ = 896596200.

The previous prime is 2161793467. The next prime is 2161793497. The reversal of 2161793494 is 4943971612.

It is a super-2 number, since 2×2161793494² = 9346702221401456072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161793497) 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, 2490112 + ... + 2490979.

It is an arithmetic number, because the mean of its divisors is an integer number (239092416).

Almost surely, 2^2161793494 is an apocalyptic number.

2161793494 is a deficient number, since it is larger than the sum of its proper divisors (1663685162).

2161793494 is a wasteful number, since it uses less digits than its factorization.

2161793494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4981131.

The product of its digits is 326592, while the sum is 46.

The square root of 2161793494 is about 46495.0910742199. The cubic root of 2161793494 is about 1293.0184896431.

The spelling of 2161793494 in words is "two billion, one hundred sixty-one million, seven hundred ninety-three thousand, four hundred ninety-four".