2491821086 has 32 divisors (see below), whose sum is σ = 3844843200. Its totient is φ = 1210809600.

The previous prime is 2491821077. The next prime is 2491821097. The reversal of 2491821086 is 6801281942.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4782506 + ... + 4783026.

It is an arithmetic number, because the mean of its divisors is an integer number (120151350).

Almost surely, 2^2491821086 is an apocalyptic number.

2491821086 is a deficient number, since it is larger than the sum of its proper divisors (1353022114).

2491821086 is a wasteful number, since it uses less digits than its factorization.

2491821086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 2491821086 is about 49918.1438557164. The cubic root of 2491821086 is about 1355.7271254302.

The spelling of 2491821086 in words is "two billion, four hundred ninety-one million, eight hundred twenty-one thousand, eighty-six".