405740052385 has 16 divisors (see below), whose sum is σ = 515547030096. Its totient is φ = 305487433728.

The previous prime is 405740052373. The next prime is 405740052391. The reversal of 405740052385 is 583250047504.

It can be written as a sum of positive squares in 8 ways, for example, as 29956340241 + 375783712144 = 173079^2 + 613012^2 .

It is a cyclic number.

It is not a de Polignac number, because 405740052385 - 2³⁵ = 371380314017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2911417 + ... + 3047593.

It is an arithmetic number, because the mean of its divisors is an integer number (32221689381).

Almost surely, 2^405740052385 is an apocalyptic number.

It is an amenable number.

405740052385 is a deficient number, since it is larger than the sum of its proper divisors (109806977711).

405740052385 is a wasteful number, since it uses less digits than its factorization.

405740052385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171252.

The product of its (nonzero) digits is 672000, while the sum is 43.

Adding to 405740052385 its reverse (583250047504), we get a palindrome (988990099889).

The spelling of 405740052385 in words is "four hundred five billion, seven hundred forty million, fifty-two thousand, three hundred eighty-five".