2640556201 has 2 divisors, whose sum is σ = 2640556202. Its totient is φ = 2640556200.

The previous prime is 2640556189. The next prime is 2640556207. The reversal of 2640556201 is 1026550462.

2640556201 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., 2075258025 + 565298176 = 45555^2 + 23776^2 .

It is a cyclic number.

It is not a de Polignac number, because 2640556201 - 2¹⁵ = 2640523433 is a prime.

It is not a weakly prime, because it can be changed into another prime (2640556207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320278100 + 1320278101.

It is an arithmetic number, because the mean of its divisors is an integer number (1320278101).

Almost surely, 2^2640556201 is an apocalyptic number.

It is an amenable number.

2640556201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2640556201 is an equidigital number, since it uses as much as digits as its factorization.

2640556201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2640556201 is about 51386.3425532505. The cubic root of 2640556201 is about 1382.1816993966.

The spelling of 2640556201 in words is "two billion, six hundred forty million, five hundred fifty-six thousand, two hundred one".