6561202423 has 2 divisors, whose sum is σ = 6561202424. Its totient is φ = 6561202422.

The previous prime is 6561202399. The next prime is 6561202457. The reversal of 6561202423 is 3242021656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6561202423 - 2²⁵ = 6527647991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6561202223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280601211 + 3280601212.

It is an arithmetic number, because the mean of its divisors is an integer number (3280601212).

Almost surely, 2^6561202423 is an apocalyptic number.

6561202423 is a deficient number, since it is larger than the sum of its proper divisors (1).

6561202423 is an equidigital number, since it uses as much as digits as its factorization.

6561202423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 6561202423 is about 81001.2495150538. The cubic root of 6561202423 is about 1872.0946932605.

The spelling of 6561202423 in words is "six billion, five hundred sixty-one million, two hundred two thousand, four hundred twenty-three".