2600206643 has 4 divisors (see below), whose sum is σ = 2602053480. Its totient is φ = 2598359808.

The previous prime is 2600206621. The next prime is 2600206669. The reversal of 2600206643 is 3466020062.

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 2600206643 - 2⁸ = 2600206387 is a prime.

It is a super-2 number, since 2×2600206643² = 13522149172602658898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2600206673) 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, 921305 + ... + 924122.

It is an arithmetic number, because the mean of its divisors is an integer number (650513370).

Almost surely, 2^2600206643 is an apocalyptic number.

2600206643 is a deficient number, since it is larger than the sum of its proper divisors (1846837).

2600206643 is a wasteful number, since it uses less digits than its factorization.

2600206643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846836.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 2600206643 is about 50992.2213969935. The cubic root of 2600206643 is about 1375.1052953855.

The spelling of 2600206643 in words is "two billion, six hundred million, two hundred six thousand, six hundred forty-three".