2621661241 has 8 divisors (see below), whose sum is σ = 2639986920. Its totient is φ = 2603384832.

The previous prime is 2621661151. The next prime is 2621661247. The reversal of 2621661241 is 1421661262.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50765625 + 2570895616 = 7125^2 + 50704^2 .

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 2621661241 - 2⁷ = 2621661113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621661247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97881 + ... + 121753.

It is an arithmetic number, because the mean of its divisors is an integer number (329998365).

Almost surely, 2^2621661241 is an apocalyptic number.

It is an amenable number.

2621661241 is a deficient number, since it is larger than the sum of its proper divisors (18325679).

2621661241 is a wasteful number, since it uses less digits than its factorization.

2621661241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24635.

The product of its digits is 6912, while the sum is 31.

The square root of 2621661241 is about 51202.1605110566. The cubic root of 2621661241 is about 1378.8769903473.

The spelling of 2621661241 in words is "two billion, six hundred twenty-one million, six hundred sixty-one thousand, two hundred forty-one".