320523555405 has 32 divisors (see below), whose sum is σ = 530378956800. Its totient is φ = 165190888512.

The previous prime is 320523555377. The next prime is 320523555463. The reversal of 320523555405 is 504555325023.

It is a happy number.

It is not a de Polignac number, because 320523555405 - 2¹⁰ = 320523554381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2821795 + ... + 2933184.

It is an arithmetic number, because the mean of its divisors is an integer number (16574342400).

Almost surely, 2^320523555405 is an apocalyptic number.

It is an amenable number.

320523555405 is a deficient number, since it is larger than the sum of its proper divisors (209855401395).

320523555405 is a wasteful number, since it uses less digits than its factorization.

320523555405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5755113.

The product of its (nonzero) digits is 450000, while the sum is 39.

The spelling of 320523555405 in words is "three hundred twenty billion, five hundred twenty-three million, five hundred fifty-five thousand, four hundred five".