2634839561 has 2 divisors, whose sum is σ = 2634839562. Its totient is φ = 2634839560.

The previous prime is 2634839533. The next prime is 2634839569. The reversal of 2634839561 is 1659384362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2047019536 + 587820025 = 45244^2 + 24245^2 .

It is a cyclic number.

It is not a de Polignac number, because 2634839561 - 2¹⁰ = 2634838537 is a prime.

It is not a weakly prime, because it can be changed into another prime (2634839569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1317419780 + 1317419781.

It is an arithmetic number, because the mean of its divisors is an integer number (1317419781).

Almost surely, 2^2634839561 is an apocalyptic number.

It is an amenable number.

2634839561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2634839561 is an equidigital number, since it uses as much as digits as its factorization.

2634839561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 47.

The square root of 2634839561 is about 51330.6882965736. The cubic root of 2634839561 is about 1381.1835329126.

The spelling of 2634839561 in words is "two billion, six hundred thirty-four million, eight hundred thirty-nine thousand, five hundred sixty-one".