2491678263 has 8 divisors (see below), whose sum is σ = 3331813248. Its totient is φ = 1656331064.

The previous prime is 2491678247. The next prime is 2491678303. The reversal of 2491678263 is 3628761942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2491678263 - 2⁴ = 2491678247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491678213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195731 + ... + 1197812.

It is an arithmetic number, because the mean of its divisors is an integer number (416476656).

Almost surely, 2^2491678263 is an apocalyptic number.

2491678263 is a deficient number, since it is larger than the sum of its proper divisors (840134985).

2491678263 is a wasteful number, since it uses less digits than its factorization.

2491678263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393893.

The product of its digits is 870912, while the sum is 48.

The square root of 2491678263 is about 49916.7132631947. The cubic root of 2491678263 is about 1355.7012229933.

The spelling of 2491678263 in words is "two billion, four hundred ninety-one million, six hundred seventy-eight thousand, two hundred sixty-three".