2491420194 has 112 divisors (see below), whose sum is σ = 5769597240. Its totient is φ = 806215680.

The previous prime is 2491420187. The next prime is 2491420241. The reversal of 2491420194 is 4910241942.

2491420194 is a `hidden beast` number, since 2 + 49 + 1 + 420 + 194 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2322758025 + 168662169 = 48195^2 + 12987^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 9694114 + ... + 9694370.

Almost surely, 2^2491420194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491420194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2884798620).

2491420194 is an abundant number, since it is smaller than the sum of its proper divisors (3278177046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2491420194 is a wasteful number, since it uses less digits than its factorization.

2491420194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2491420194 is about 49914.1282003402. The cubic root of 2491420194 is about 1355.6544169853.

The spelling of 2491420194 in words is "two billion, four hundred ninety-one million, four hundred twenty thousand, one hundred ninety-four".