206615572453 has 2 divisors, whose sum is σ = 206615572454. Its totient is φ = 206615572452.

The previous prime is 206615572363. The next prime is 206615572469. The reversal of 206615572453 is 354275516602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182172751489 + 24442820964 = 426817^2 + 156342^2 .

It is a cyclic number.

It is not a de Polignac number, because 206615572453 - 2¹³ = 206615564261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206615572483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103307786226 + 103307786227.

It is an arithmetic number, because the mean of its divisors is an integer number (103307786227).

Almost surely, 2^206615572453 is an apocalyptic number.

It is an amenable number.

206615572453 is a deficient number, since it is larger than the sum of its proper divisors (1).

206615572453 is an equidigital number, since it uses as much as digits as its factorization.

206615572453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 46.

The spelling of 206615572453 in words is "two hundred six billion, six hundred fifteen million, five hundred seventy-two thousand, four hundred fifty-three".