2400260561 has 2 divisors, whose sum is σ = 2400260562. Its totient is φ = 2400260560.

The previous prime is 2400260539. The next prime is 2400260563. The reversal of 2400260561 is 1650620042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2336755600 + 63504961 = 48340^2 + 7969^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400260561 - 2⁶ = 2400260497 is a prime.

It is a super-2 number, since 2×2400260561² = 11522501521384069442, which contains 22 as substring.

Together with 2400260563, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2400260561.

It is not a weakly prime, because it can be changed into another prime (2400260563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200130280 + 1200130281.

It is an arithmetic number, because the mean of its divisors is an integer number (1200130281).

Almost surely, 2^2400260561 is an apocalyptic number.

It is an amenable number.

2400260561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2400260561 is an equidigital number, since it uses as much as digits as its factorization.

2400260561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2400260561 is about 48992.4541230586. The cubic root of 2400260561 is about 1338.9143506663.

The spelling of 2400260561 in words is "two billion, four hundred million, two hundred sixty thousand, five hundred sixty-one".