2625605281 has 4 divisors (see below), whose sum is σ = 2827574932. Its totient is φ = 2423635632.

The previous prime is 2625605251. The next prime is 2625605309. The reversal of 2625605281 is 1825065262.

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 1748912400 + 876692881 = 41820^2 + 29609^2 .

It is a cyclic number.

It is not a de Polignac number, because 2625605281 - 2²⁹ = 2088734369 is a prime.

It is a super-2 number, since 2×2625605281² = 13787606183230177922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2625605281.

It is not an unprimeable number, because it can be changed into a prime (2625605251) 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, 100984806 + ... + 100984831.

It is an arithmetic number, because the mean of its divisors is an integer number (706893733).

Almost surely, 2^2625605281 is an apocalyptic number.

It is an amenable number.

2625605281 is a deficient number, since it is larger than the sum of its proper divisors (201969651).

2625605281 is a wasteful number, since it uses less digits than its factorization.

2625605281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201969650.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 2625605281 is about 51240.6604270476. The cubic root of 2625605281 is about 1379.5681069873.

The spelling of 2625605281 in words is "two billion, six hundred twenty-five million, six hundred five thousand, two hundred eighty-one".