2491663203 has 6 divisors (see below), whose sum is σ = 3599069084. Its totient is φ = 1661108796.

The previous prime is 2491663199. The next prime is 2491663243. The reversal of 2491663203 is 3023661942.

2491663203 is a `hidden beast` number, since 2 + 4 + 9 + 16 + 632 + 0 + 3 = 666.

It is not a de Polignac number, because 2491663203 - 2² = 2491663199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2491663243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138425725 + ... + 138425742.

Almost surely, 2^2491663203 is an apocalyptic number.

2491663203 is a deficient number, since it is larger than the sum of its proper divisors (1107405881).

2491663203 is a wasteful number, since it uses less digits than its factorization.

2491663203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276851473 (or 276851470 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 2491663203 is about 49916.5624116886. The cubic root of 2491663203 is about 1355.6984916480.

The spelling of 2491663203 in words is "two billion, four hundred ninety-one million, six hundred sixty-three thousand, two hundred three".