445666993398 has 48 divisors (see below), whose sum is σ = 1115359114896. Its totient is φ = 127106449920.

The previous prime is 445666993391. The next prime is 445666993399. The reversal of 445666993398 is 893399666544.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445666993391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66197911 + ... + 66204642.

It is an arithmetic number, because the mean of its divisors is an integer number (23236648227).

Almost surely, 2^445666993398 is an apocalyptic number.

445666993398 is an abundant number, since it is smaller than the sum of its proper divisors (669692121498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445666993398 is a wasteful number, since it uses less digits than its factorization.

445666993398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132402589 (or 132402586 counting only the distinct ones).

The product of its digits is 906992640, while the sum is 72.

The spelling of 445666993398 in words is "four hundred forty-five billion, six hundred sixty-six million, nine hundred ninety-three thousand, three hundred ninety-eight".