405525445939 has 2 divisors, whose sum is σ = 405525445940. Its totient is φ = 405525445938.

The previous prime is 405525445909. The next prime is 405525445957. The reversal of 405525445939 is 939544525504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405525445939 - 2¹³ = 405525437747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405525445939.

It is not a weakly prime, because it can be changed into another prime (405525445909) 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, 202762722969 + 202762722970.

It is an arithmetic number, because the mean of its divisors is an integer number (202762722970).

Almost surely, 2^405525445939 is an apocalyptic number.

405525445939 is a deficient number, since it is larger than the sum of its proper divisors (1).

405525445939 is an equidigital number, since it uses as much as digits as its factorization.

405525445939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440000, while the sum is 55.

The spelling of 405525445939 in words is "four hundred five billion, five hundred twenty-five million, four hundred forty-five thousand, nine hundred thirty-nine".