405565252399 has 2 divisors, whose sum is σ = 405565252400. Its totient is φ = 405565252398.

The previous prime is 405565252361. The next prime is 405565252403. The reversal of 405565252399 is 993252565504.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405565252399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405565252319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202782626199 + 202782626200.

It is an arithmetic number, because the mean of its divisors is an integer number (202782626200).

Almost surely, 2^405565252399 is an apocalyptic number.

405565252399 is a deficient number, since it is larger than the sum of its proper divisors (1).

405565252399 is an equidigital number, since it uses as much as digits as its factorization.

405565252399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580000, while the sum is 55.

The spelling of 405565252399 in words is "four hundred five billion, five hundred sixty-five million, two hundred fifty-two thousand, three hundred ninety-nine".