2562631261 has 4 divisors (see below), whose sum is σ = 2568550012. Its totient is φ = 2556712512.

The previous prime is 2562631223. The next prime is 2562631271. The reversal of 2562631261 is 1621362652.

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 268796025 + 2293835236 = 16395^2 + 47894^2 .

It is a cyclic number.

It is not a de Polignac number, because 2562631261 - 2⁷ = 2562631133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2562631271) 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, 2958726 + ... + 2959591.

It is an arithmetic number, because the mean of its divisors is an integer number (642137503).

Almost surely, 2^2562631261 is an apocalyptic number.

It is an amenable number.

2562631261 is a deficient number, since it is larger than the sum of its proper divisors (5918751).

2562631261 is an equidigital number, since it uses as much as digits as its factorization.

2562631261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5918750.

The product of its digits is 25920, while the sum is 34.

The square root of 2562631261 is about 50622.4383154348. The cubic root of 2562631261 is about 1368.4492836281.

The spelling of 2562631261 in words is "two billion, five hundred sixty-two million, six hundred thirty-one thousand, two hundred sixty-one".