2491859188 has 24 divisors (see below), whose sum is σ = 5367082112. Its totient is φ = 985790304.

The previous prime is 2491859129. The next prime is 2491859213. The reversal of 2491859188 is 8819581942.

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 7 ways as a sum of consecutive naturals, for example, 3422520 + ... + 3423247.

Almost surely, 2^2491859188 is an apocalyptic number.

2491859188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2491859188 is an abundant number, since it is smaller than the sum of its proper divisors (2875222924).

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

2491859188 is a wasteful number, since it uses less digits than its factorization.

2491859188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6845791 (or 6845789 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 55.

The square root of 2491859188 is about 49918.5254990570. The cubic root of 2491859188 is about 1355.7340354570.

The spelling of 2491859188 in words is "two billion, four hundred ninety-one million, eight hundred fifty-nine thousand, one hundred eighty-eight".