6364525421 has 2 divisors, whose sum is σ = 6364525422. Its totient is φ = 6364525420.

The previous prime is 6364525393. The next prime is 6364525423. The reversal of 6364525421 is 1245254636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4203577225 + 2160948196 = 64835^2 + 46486^2 .

It is a cyclic number.

It is not a de Polignac number, because 6364525421 - 2⁶ = 6364525357 is a prime.

Together with 6364525423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6364525423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3182262710 + 3182262711.

It is an arithmetic number, because the mean of its divisors is an integer number (3182262711).

Almost surely, 2^6364525421 is an apocalyptic number.

It is an amenable number.

6364525421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6364525421 is an equidigital number, since it uses as much as digits as its factorization.

6364525421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 38.

The square root of 6364525421 is about 79777.9757890610. The cubic root of 6364525421 is about 1853.1987922241.

The spelling of 6364525421 in words is "six billion, three hundred sixty-four million, five hundred twenty-five thousand, four hundred twenty-one".