8240361491 has 4 divisors (see below), whose sum is σ = 8258159712. Its totient is φ = 8222563272.

The previous prime is 8240361487. The next prime is 8240361553. The reversal of 8240361491 is 1941630428.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8240361491 - 2² = 8240361487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8240361461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8898416 + ... + 8899341.

It is an arithmetic number, because the mean of its divisors is an integer number (2064539928).

Almost surely, 2^8240361491 is an apocalyptic number.

8240361491 is a deficient number, since it is larger than the sum of its proper divisors (17798221).

8240361491 is a wasteful number, since it uses less digits than its factorization.

8240361491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17798220.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 8240361491 is about 90776.4368710295. The cubic root of 8240361491 is about 2019.8328041042.

The spelling of 8240361491 in words is "eight billion, two hundred forty million, three hundred sixty-one thousand, four hundred ninety-one".