2601643645 has 8 divisors (see below), whose sum is σ = 3174887520. Its totient is φ = 2046038160.

The previous prime is 2601643619. The next prime is 2601643657. The reversal of 2601643645 is 5463461062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2601643645 - 2¹³ = 2601635453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4409271 + ... + 4409860.

It is an arithmetic number, because the mean of its divisors is an integer number (396860940).

Almost surely, 2^2601643645 is an apocalyptic number.

It is an amenable number.

2601643645 is a deficient number, since it is larger than the sum of its proper divisors (573243875).

2601643645 is an equidigital number, since it uses as much as digits as its factorization.

2601643645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8819195.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 2601643645 is about 51006.3098547621. The cubic root of 2601643645 is about 1375.3585656605.

The spelling of 2601643645 in words is "two billion, six hundred one million, six hundred forty-three thousand, six hundred forty-five".