445668537897 has 18 divisors (see below), whose sum is σ = 707585770346. Its totient is φ = 270102143520.

The previous prime is 445668537883. The next prime is 445668537901. The reversal of 445668537897 is 798735866544.

445668537897 is a `hidden beast` number, since 4 + 4 + 5 + 6 + 6 + 8 + 537 + 89 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 395948011536 + 49720526361 = 629244^2 + 222981^2 .

It is not a de Polignac number, because 445668537897 - 2⁶ = 445668537833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445668537997) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 204621748 + ... + 204623925.

Almost surely, 2^445668537897 is an apocalyptic number.

It is an amenable number.

445668537897 is a deficient number, since it is larger than the sum of its proper divisors (261917232449).

445668537897 is a wasteful number, since it uses less digits than its factorization.

445668537897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409245701 (or 409245687 counting only the distinct ones).

The product of its digits is 1219276800, while the sum is 72.

The spelling of 445668537897 in words is "four hundred forty-five billion, six hundred sixty-eight million, five hundred thirty-seven thousand, eight hundred ninety-seven".