2461621643 has 4 divisors (see below), whose sum is σ = 2650977168. Its totient is φ = 2272266120.

The previous prime is 2461621639. The next prime is 2461621661. The reversal of 2461621643 is 3461261642.

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 2461621643 - 2² = 2461621639 is a prime.

It is a super-2 number, since 2×2461621643² = 12119162226572038898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2461621693) 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, 94677743 + ... + 94677768.

It is an arithmetic number, because the mean of its divisors is an integer number (662744292).

Almost surely, 2^2461621643 is an apocalyptic number.

2461621643 is a deficient number, since it is larger than the sum of its proper divisors (189355525).

2461621643 is a wasteful number, since it uses less digits than its factorization.

2461621643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189355524.

The product of its digits is 41472, while the sum is 35.

The square root of 2461621643 is about 49614.7321165801. The cubic root of 2461621643 is about 1350.2279711945.

The spelling of 2461621643 in words is "two billion, four hundred sixty-one million, six hundred twenty-one thousand, six hundred forty-three".