2194250661 has 8 divisors (see below), whose sum is σ = 3250741760. Its totient is φ = 1462833756.

The previous prime is 2194250659. The next prime is 2194250687. The reversal of 2194250661 is 1660524912.

2194250661 is a `hidden beast` number, since 2 + 1 + 94 + 2 + 506 + 61 = 666.

It is not a de Polignac number, because 2194250661 - 2¹ = 2194250659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194250561) 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, 40634245 + ... + 40634298.

It is an arithmetic number, because the mean of its divisors is an integer number (406342720).

Almost surely, 2^2194250661 is an apocalyptic number.

It is an amenable number.

2194250661 is a deficient number, since it is larger than the sum of its proper divisors (1056491099).

2194250661 is an equidigital number, since it uses as much as digits as its factorization.

2194250661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81268552 (or 81268546 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2194250661 is about 46842.8293445219. The cubic root of 2194250661 is about 1299.4574977033.

The spelling of 2194250661 in words is "two billion, one hundred ninety-four million, two hundred fifty thousand, six hundred sixty-one".