405254523140405 has 16 divisors (see below), whose sum is σ = 486345514497024. Its totient is φ = 324176895282240.

The previous prime is 405254523140381. The next prime is 405254523140413. The reversal of 405254523140405 is 504041325452504.

It is not a de Polignac number, because 405254523140405 - 2³⁴ = 405237343271221 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 4206848090 + ... + 4206944420.

It is an arithmetic number, because the mean of its divisors is an integer number (30396594656064).

Almost surely, 2^{405254523140405} is an apocalyptic number.

It is an amenable number.

405254523140405 is a deficient number, since it is larger than the sum of its proper divisors (81090991356619).

405254523140405 is a wasteful number, since it uses less digits than its factorization.

405254523140405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156956.

The product of its (nonzero) digits is 1920000, while the sum is 44.

Adding to 405254523140405 its reverse (504041325452504), we get a palindrome (909295848592909).

The spelling of 405254523140405 in words is "four hundred five trillion, two hundred fifty-four billion, five hundred twenty-three million, one hundred forty thousand, four hundred five".