2641162561 has 2 divisors, whose sum is σ = 2641162562. Its totient is φ = 2641162560.

The previous prime is 2641162543. The next prime is 2641162577. The reversal of 2641162561 is 1652611462.

2641162561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1582050625 + 1059111936 = 39775^2 + 32544^2 .

It is a cyclic number.

It is not a de Polignac number, because 2641162561 - 2¹⁷ = 2641031489 is a prime.

It is not a weakly prime, because it can be changed into another prime (2641162061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320581280 + 1320581281.

It is an arithmetic number, because the mean of its divisors is an integer number (1320581281).

Almost surely, 2^2641162561 is an apocalyptic number.

It is an amenable number.

2641162561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2641162561 is an equidigital number, since it uses as much as digits as its factorization.

2641162561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 2641162561 is about 51392.2422258457. The cubic root of 2641162561 is about 1382.2874896781.

The spelling of 2641162561 in words is "two billion, six hundred forty-one million, one hundred sixty-two thousand, five hundred sixty-one".