445073210891 has 2 divisors, whose sum is σ = 445073210892. Its totient is φ = 445073210890.

The previous prime is 445073210873. The next prime is 445073210947. The reversal of 445073210891 is 198012370544.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-445073210891 is a prime.

It is a super-2 number, since 2×445073210891² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (445073210861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222536605445 + 222536605446.

It is an arithmetic number, because the mean of its divisors is an integer number (222536605446).

Almost surely, 2^445073210891 is an apocalyptic number.

445073210891 is a deficient number, since it is larger than the sum of its proper divisors (1).

445073210891 is an equidigital number, since it uses as much as digits as its factorization.

445073210891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 445073210891 in words is "four hundred forty-five billion, seventy-three million, two hundred ten thousand, eight hundred ninety-one".