2553643261 has 4 divisors (see below), whose sum is σ = 2750077372. Its totient is φ = 2357209152.

The previous prime is 2553643247. The next prime is 2553643271. The reversal of 2553643261 is 1623463552.

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 154504900 + 2399138361 = 12430^2 + 48981^2 .

It is a cyclic number.

It is not a de Polignac number, because 2553643261 - 2²³ = 2545254653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2553643261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2553643201) 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, 98217036 + ... + 98217061.

It is an arithmetic number, because the mean of its divisors is an integer number (687519343).

Almost surely, 2^2553643261 is an apocalyptic number.

It is an amenable number.

2553643261 is a deficient number, since it is larger than the sum of its proper divisors (196434111).

2553643261 is a wasteful number, since it uses less digits than its factorization.

2553643261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196434110.

The product of its digits is 129600, while the sum is 37.

The square root of 2553643261 is about 50533.5854754044. The cubic root of 2553643261 is about 1366.8475406520.

The spelling of 2553643261 in words is "two billion, five hundred fifty-three million, six hundred forty-three thousand, two hundred sixty-one".