445025213646 has 64 divisors (see below), whose sum is σ = 970659825408. Its totient is φ = 135198010368.

The previous prime is 445025213641. The next prime is 445025213671. The reversal of 445025213646 is 646312520544.

It is a happy number.

It is a super-2 number, since 2×445025213646² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 445025213598 and 445025213607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445025213641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10966125 + ... + 11006631.

It is an arithmetic number, because the mean of its divisors is an integer number (15166559772).

Almost surely, 2^445025213646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445025213646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485329912704).

445025213646 is an abundant number, since it is smaller than the sum of its proper divisors (525634611762).

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

445025213646 is a wasteful number, since it uses less digits than its factorization.

445025213646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42305.

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 445025213646 in words is "four hundred forty-five billion, twenty-five million, two hundred thirteen thousand, six hundred forty-six".