2606631645 has 8 divisors (see below), whose sum is σ = 4170610656. Its totient is φ = 1390203536.

The previous prime is 2606631619. The next prime is 2606631647. The reversal of 2606631645 is 5461366062.

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 2606631645 - 2⁹ = 2606631133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2606631647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86887707 + ... + 86887736.

It is an arithmetic number, because the mean of its divisors is an integer number (521326332).

Almost surely, 2^2606631645 is an apocalyptic number.

It is an amenable number.

2606631645 is a deficient number, since it is larger than the sum of its proper divisors (1563979011).

2606631645 is a wasteful number, since it uses less digits than its factorization.

2606631645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173775451.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 2606631645 is about 51055.1823520394. The cubic root of 2606631645 is about 1376.2369730354.

The spelling of 2606631645 in words is "two billion, six hundred six million, six hundred thirty-one thousand, six hundred forty-five".