405525445957 has 2 divisors, whose sum is σ = 405525445958. Its totient is φ = 405525445956.

The previous prime is 405525445939. The next prime is 405525445979. The reversal of 405525445957 is 759544525504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394441778116 + 11083667841 = 628046^2 + 105279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405525445957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405525445898 and 405525445907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405525445987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202762722978 + 202762722979.

It is an arithmetic number, because the mean of its divisors is an integer number (202762722979).

Almost surely, 2^405525445957 is an apocalyptic number.

It is an amenable number.

405525445957 is a deficient number, since it is larger than the sum of its proper divisors (1).

405525445957 is an equidigital number, since it uses as much as digits as its factorization.

405525445957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200000, while the sum is 55.

The spelling of 405525445957 in words is "four hundred five billion, five hundred twenty-five million, four hundred forty-five thousand, nine hundred fifty-seven".