320382581421 has 12 divisors (see below), whose sum is σ = 496919922432. Its totient is φ = 183075760728.

The previous prime is 320382581371. The next prime is 320382581429. The reversal of 320382581421 is 124185283023.

It is not a de Polignac number, because 320382581421 - 2³³ = 311792646829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320382581421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320382581429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1089736525 + ... + 1089736818.

It is an arithmetic number, because the mean of its divisors is an integer number (41409993536).

Almost surely, 2^320382581421 is an apocalyptic number.

It is an amenable number.

320382581421 is a deficient number, since it is larger than the sum of its proper divisors (176537341011).

320382581421 is a wasteful number, since it uses less digits than its factorization.

320382581421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179473360 (or 2179473353 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 320382581421 in words is "three hundred twenty billion, three hundred eighty-two million, five hundred eighty-one thousand, four hundred twenty-one".