445466284398891 has 80 divisors (see below), whose sum is σ = 765923153529600. Its totient is φ = 252745933027392.

The previous prime is 445466284398887. The next prime is 445466284398911. The reversal of 445466284398891 is 198893482664544.

445466284398891 is a `hidden beast` number, since 4 + 4 + 5 + 4 + 6 + 62 + 84 + 398 + 8 + 91 = 666.

It is not a de Polignac number, because 445466284398891 - 2² = 445466284398887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 445466284398891.

It is not an unprimeable number, because it can be changed into a prime (445466284398881) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 63553741 + ... + 70214033.

It is an arithmetic number, because the mean of its divisors is an integer number (9574039419120).

Almost surely, 2^{445466284398891} is an apocalyptic number.

445466284398891 is a deficient number, since it is larger than the sum of its proper divisors (320456869130709).

445466284398891 is a wasteful number, since it uses less digits than its factorization.

445466284398891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6661150 (or 6661141 counting only the distinct ones).

The product of its digits is 11466178560, while the sum is 81.

The spelling of 445466284398891 in words is "four hundred forty-five trillion, four hundred sixty-six billion, two hundred eighty-four million, three hundred ninety-eight thousand, eight hundred ninety-one".