2654939561 has 2 divisors, whose sum is σ = 2654939562. Its totient is φ = 2654939560.

The previous prime is 2654939549. The next prime is 2654939579. The reversal of 2654939561 is 1659394562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2542176400 + 112763161 = 50420^2 + 10619^2 .

It is a cyclic number.

It is not a de Polignac number, because 2654939561 - 2¹⁴ = 2654923177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2654939591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327469780 + 1327469781.

It is an arithmetic number, because the mean of its divisors is an integer number (1327469781).

Almost surely, 2^2654939561 is an apocalyptic number.

It is an amenable number.

2654939561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2654939561 is an equidigital number, since it uses as much as digits as its factorization.

2654939561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1749600, while the sum is 50.

The square root of 2654939561 is about 51526.1056261775. The cubic root of 2654939561 is about 1384.6867813388.

The spelling of 2654939561 in words is "two billion, six hundred fifty-four million, nine hundred thirty-nine thousand, five hundred sixty-one".