445311806242 has 4 divisors (see below), whose sum is σ = 667967709366. Its totient is φ = 222655903120.

The previous prime is 445311806239. The next prime is 445311806243. The reversal of 445311806242 is 242608113544.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 267515493961 + 177796312281 = 517219^2 + 421659^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 445311806195 and 445311806204.

It is not an unprimeable number, because it can be changed into a prime (445311806243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111327951559 + ... + 111327951562.

Almost surely, 2^445311806242 is an apocalyptic number.

445311806242 is a deficient number, since it is larger than the sum of its proper divisors (222655903124).

445311806242 is a wasteful number, since it uses less digits than its factorization.

445311806242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222655903123.

The product of its (nonzero) digits is 184320, while the sum is 40.

Adding to 445311806242 its reverse (242608113544), we get a palindrome (687919919786).

The spelling of 445311806242 in words is "four hundred forty-five billion, three hundred eleven million, eight hundred six thousand, two hundred forty-two".