2490996181 has 4 divisors (see below), whose sum is σ = 2516676652. Its totient is φ = 2465315712.

The previous prime is 2490996139. The next prime is 2490996203. The reversal of 2490996181 is 1816990942.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1694063281 + 796932900 = 41159^2 + 28230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2490996181 is a prime.

It is a super-2 number, since 2×2490996181² = 12410123947513169522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2490796181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12840090 + ... + 12840283.

It is an arithmetic number, because the mean of its divisors is an integer number (629169163).

Almost surely, 2^2490996181 is an apocalyptic number.

It is an amenable number.

2490996181 is a deficient number, since it is larger than the sum of its proper divisors (25680471).

2490996181 is an equidigital number, since it uses as much as digits as its factorization.

2490996181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25680470.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 2490996181 is about 49909.8805949283. The cubic root of 2490996181 is about 1355.5775066740.

The spelling of 2490996181 in words is "two billion, four hundred ninety million, nine hundred ninety-six thousand, one hundred eighty-one".