6403221157 has 2 divisors, whose sum is σ = 6403221158. Its totient is φ = 6403221156.

The previous prime is 6403221127. The next prime is 6403221191. The reversal of 6403221157 is 7511223046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4488196036 + 1915025121 = 66994^2 + 43761^2 .

It is a cyclic number.

It is not a de Polignac number, because 6403221157 - 2⁷ = 6403221029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6403221127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201610578 + 3201610579.

It is an arithmetic number, because the mean of its divisors is an integer number (3201610579).

Almost surely, 2^6403221157 is an apocalyptic number.

It is an amenable number.

6403221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6403221157 is an equidigital number, since it uses as much as digits as its factorization.

6403221157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 6403221157 is about 80020.1296987202. The cubic root of 6403221157 is about 1856.9469663348.

The spelling of 6403221157 in words is "six billion, four hundred three million, two hundred twenty-one thousand, one hundred fifty-seven".