2491371965 has 8 divisors (see below), whose sum is σ = 3007549440. Its totient is φ = 1981162192.

The previous prime is 2491371899. The next prime is 2491372001. The reversal of 2491371965 is 5691731942.

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 2491371965 - 2¹⁸ = 2491109821 is a prime.

It is a super-2 number, since 2×2491371965² = 12413868535975922450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491005 + ... + 1492674.

It is an arithmetic number, because the mean of its divisors is an integer number (375943680).

Almost surely, 2^2491371965 is an apocalyptic number.

It is an amenable number.

2491371965 is a deficient number, since it is larger than the sum of its proper divisors (516177475).

2491371965 is a wasteful number, since it uses less digits than its factorization.

2491371965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2983851.

The product of its digits is 408240, while the sum is 47.

The square root of 2491371965 is about 49913.6450782749. The cubic root of 2491371965 is about 1355.6456693269.

The spelling of 2491371965 in words is "two billion, four hundred ninety-one million, three hundred seventy-one thousand, nine hundred sixty-five".