445636610646 has 8 divisors (see below), whose sum is σ = 891273221304. Its totient is φ = 148545536880.

The previous prime is 445636610623. The next prime is 445636610729. The reversal of 445636610646 is 646016636544.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

445636610646 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37136384215 + ... + 37136384226.

It is an arithmetic number, because the mean of its divisors is an integer number (111409152663).

Almost surely, 2^445636610646 is an apocalyptic number.

445636610646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

445636610646 is a wasteful number, since it uses less digits than its factorization.

445636610646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74272768446.

The product of its (nonzero) digits is 7464960, while the sum is 51.

The spelling of 445636610646 in words is "four hundred forty-five billion, six hundred thirty-six million, six hundred ten thousand, six hundred forty-six".