2400543491 has 4 divisors (see below), whose sum is σ = 2400645912. Its totient is φ = 2400441072.

The previous prime is 2400543427. The next prime is 2400543503. The reversal of 2400543491 is 1943450042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1943450042 = 2 ⋅971725021.

It is a cyclic number.

It is not a de Polignac number, because 2400543491 - 2⁶ = 2400543427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2400540491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3260 + ... + 69366.

It is an arithmetic number, because the mean of its divisors is an integer number (600161478).

Almost surely, 2^2400543491 is an apocalyptic number.

2400543491 is a deficient number, since it is larger than the sum of its proper divisors (102421).

2400543491 is an equidigital number, since it uses as much as digits as its factorization.

2400543491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102420.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 2400543491 is about 48995.3415234551. The cubic root of 2400543491 is about 1338.9669566430.

The spelling of 2400543491 in words is "two billion, four hundred million, five hundred forty-three thousand, four hundred ninety-one".