2448661591 has 4 divisors (see below), whose sum is σ = 2514841672. Its totient is φ = 2382481512.

The previous prime is 2448661543. The next prime is 2448661597. The reversal of 2448661591 is 1951668442.

It is a happy number.

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 2448661591 - 2²³ = 2440272983 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 (2448661597) 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, 33089985 + ... + 33090058.

It is an arithmetic number, because the mean of its divisors is an integer number (628710418).

Almost surely, 2^2448661591 is an apocalyptic number.

2448661591 is a deficient number, since it is larger than the sum of its proper divisors (66180081).

2448661591 is an equidigital number, since it uses as much as digits as its factorization.

2448661591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66180080.

The product of its digits is 414720, while the sum is 46.

The square root of 2448661591 is about 49483.9528635294. The cubic root of 2448661591 is about 1347.8542209769.

The spelling of 2448661591 in words is "two billion, four hundred forty-eight million, six hundred sixty-one thousand, five hundred ninety-one".