2621563265 has 8 divisors (see below), whose sum is σ = 3146657280. Its totient is φ = 2096729712.

The previous prime is 2621563261. The next prime is 2621563277. The reversal of 2621563265 is 5623651262.

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 2621563265 - 2² = 2621563261 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2621563261) 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, 42239 + ... + 83828.

It is an arithmetic number, because the mean of its divisors is an integer number (393332160).

Almost surely, 2^2621563265 is an apocalyptic number.

It is an amenable number.

2621563265 is a deficient number, since it is larger than the sum of its proper divisors (525094015).

2621563265 is a wasteful number, since it uses less digits than its factorization.

2621563265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130231.

The product of its digits is 129600, while the sum is 38.

The square root of 2621563265 is about 51201.2037456152. The cubic root of 2621563265 is about 1378.8598131300.

The spelling of 2621563265 in words is "two billion, six hundred twenty-one million, five hundred sixty-three thousand, two hundred sixty-five".