445216977 has 12 divisors (see below), whose sum is σ = 643287684. Its totient is φ = 296720640.

The previous prime is 445216951. The next prime is 445216997. The reversal of 445216977 is 779612544.

It can be written as a sum of positive squares in 2 ways, for example, as 323136576 + 122080401 = 17976^2 + 11049^2 .

It is not a de Polignac number, because 445216977 - 2⁶ = 445216913 is a prime.

Its product of digits (423360) is a multiple of the sum of its prime factors (15120).

It is not an unprimeable number, because it can be changed into a prime (445216997) 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, 37977 + ... + 48297.

It is an arithmetic number, because the mean of its divisors is an integer number (53607307).

Almost surely, 2^445216977 is an apocalyptic number.

It is an amenable number.

445216977 is a deficient number, since it is larger than the sum of its proper divisors (198070707).

445216977 is a wasteful number, since it uses less digits than its factorization.

445216977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15120 (or 15117 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 445216977 is about 21100.1653311058. The cubic root of 445216977 is about 763.5847369357.

The spelling of 445216977 in words is "four hundred forty-five million, two hundred sixteen thousand, nine hundred seventy-seven".