2491203885 has 64 divisors (see below), whose sum is σ = 4292538624. Its totient is φ = 1229312000.

The previous prime is 2491203877. The next prime is 2491203917. The reversal of 2491203885 is 5883021942.

It is not a de Polignac number, because 2491203885 - 2³ = 2491203877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5073490 + ... + 5073980.

It is an arithmetic number, because the mean of its divisors is an integer number (67070916).

Almost surely, 2^2491203885 is an apocalyptic number.

It is an amenable number.

2491203885 is a deficient number, since it is larger than the sum of its proper divisors (1801334739).

2491203885 is a wasteful number, since it uses less digits than its factorization.

2491203885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 2491203885 is about 49911.9613419469. The cubic root of 2491203885 is about 1355.6151825039.

The spelling of 2491203885 in words is "two billion, four hundred ninety-one million, two hundred three thousand, eight hundred eighty-five".