2499812091 has 64 divisors (see below), whose sum is σ = 4313088000. Its totient is φ = 1401472800.

The previous prime is 2499812087. The next prime is 2499812137. The reversal of 2499812091 is 1902189942.

It is not a de Polignac number, because 2499812091 - 2² = 2499812087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2499812191) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4173010 + ... + 4173608.

It is an arithmetic number, because the mean of its divisors is an integer number (67392000).

Almost surely, 2^2499812091 is an apocalyptic number.

2499812091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2499812091 is a deficient number, since it is larger than the sum of its proper divisors (1813275909).

2499812091 is a wasteful number, since it uses less digits than its factorization.

2499812091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 2499812091 is about 49998.1208746889. The cubic root of 2499812091 is about 1357.1748032121.

The spelling of 2499812091 in words is "two billion, four hundred ninety-nine million, eight hundred twelve thousand, ninety-one".