2991548591 has 4 divisors (see below), whose sum is σ = 2991669384. Its totient is φ = 2991427800.

The previous prime is 2991548561. The next prime is 2991548629. The reversal of 2991548591 is 1958451992.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 2991548591 - 2¹⁸ = 2991286447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991548561) 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, 8225 + ... + 77786.

It is an arithmetic number, because the mean of its divisors is an integer number (747917346).

Almost surely, 2^2991548591 is an apocalyptic number.

2991548591 is a deficient number, since it is larger than the sum of its proper divisors (120793).

2991548591 is an equidigital number, since it uses as much as digits as its factorization.

2991548591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120792.

The product of its digits is 1166400, while the sum is 53.

The square root of 2991548591 is about 54695.0508821411. The cubic root of 2991548591 is about 1440.8939586396.

The spelling of 2991548591 in words is "two billion, nine hundred ninety-one million, five hundred forty-eight thousand, five hundred ninety-one".