2491865475 has 24 divisors (see below), whose sum is σ = 4494420672. Its totient is φ = 1208176800.

The previous prime is 2491865461. The next prime is 2491865483. The reversal of 2491865475 is 5745681942.

It is not a de Polignac number, because 2491865475 - 2⁵ = 2491865443 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1509397 + ... + 1511046.

It is an arithmetic number, because the mean of its divisors is an integer number (187267528).

Almost surely, 2^2491865475 is an apocalyptic number.

2491865475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2491865475 is a deficient number, since it is larger than the sum of its proper divisors (2002555197).

2491865475 is a wasteful number, since it uses less digits than its factorization.

2491865475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020467 (or 3020462 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 51.

The square root of 2491865475 is about 49918.5884716305. The cubic root of 2491865475 is about 1355.7351756355.

The spelling of 2491865475 in words is "two billion, four hundred ninety-one million, eight hundred sixty-five thousand, four hundred seventy-five".