2621266345 has 4 divisors (see below), whose sum is σ = 3145519620. Its totient is φ = 2097013072.

The previous prime is 2621266331. The next prime is 2621266379. The reversal of 2621266345 is 5436621262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 516016656 + 2105249689 = 22716^2 + 45883^2 .

It is a cyclic number.

It is not a de Polignac number, because 2621266345 - 2²⁷ = 2487048617 is a prime.

It is an unprimeable number.

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, 262126630 + ... + 262126639.

It is an arithmetic number, because the mean of its divisors is an integer number (786379905).

Almost surely, 2^2621266345 is an apocalyptic number.

It is an amenable number.

2621266345 is a deficient number, since it is larger than the sum of its proper divisors (524253275).

2621266345 is an equidigital number, since it uses as much as digits as its factorization.

2621266345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524253274.

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

The square root of 2621266345 is about 51198.3041223047. The cubic root of 2621266345 is about 1378.8077543045.

The spelling of 2621266345 in words is "two billion, six hundred twenty-one million, two hundred sixty-six thousand, three hundred forty-five".