2491432645 has 24 divisors (see below), whose sum is σ = 3341855232. Its totient is φ = 1780459200.

The previous prime is 2491432631. The next prime is 2491432651. The reversal of 2491432645 is 5462341942.

It is a happy number.

It is not a de Polignac number, because 2491432645 - 2⁵ = 2491432613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2491432598 and 2491432607.

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 23 ways as a sum of consecutive naturals, for example, 21361 + ... + 73750.

It is an arithmetic number, because the mean of its divisors is an integer number (139243968).

Almost surely, 2^2491432645 is an apocalyptic number.

It is an amenable number.

2491432645 is a deficient number, since it is larger than the sum of its proper divisors (850422587).

2491432645 is a wasteful number, since it uses less digits than its factorization.

2491432645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95173 (or 95160 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 2491432645 is about 49914.2529243902. The cubic root of 2491432645 is about 1355.6566752990.

The spelling of 2491432645 in words is "two billion, four hundred ninety-one million, four hundred thirty-two thousand, six hundred forty-five".