5640806401 has 2 divisors, whose sum is σ = 5640806402. Its totient is φ = 5640806400.

The previous prime is 5640806387. The next prime is 5640806411. The reversal of 5640806401 is 1046080465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3133200625 + 2507605776 = 55975^2 + 50076^2 .

It is a cyclic number.

It is not a de Polignac number, because 5640806401 - 2⁷ = 5640806273 is a prime.

It is not a weakly prime, because it can be changed into another prime (5640806411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820403200 + 2820403201.

It is an arithmetic number, because the mean of its divisors is an integer number (2820403201).

Almost surely, 2^5640806401 is an apocalyptic number.

It is an amenable number.

5640806401 is a deficient number, since it is larger than the sum of its proper divisors (1).

5640806401 is an equidigital number, since it uses as much as digits as its factorization.

5640806401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 5640806401 is about 75105.3020831419. The cubic root of 5640806401 is about 1780.1109219477.

Adding to 5640806401 its reverse (1046080465), we get a palindrome (6686886866).

The spelling of 5640806401 in words is "five billion, six hundred forty million, eight hundred six thousand, four hundred one".