444413643057646 has 4 divisors (see below), whose sum is σ = 666620464586472. Its totient is φ = 222206821528822.

The previous prime is 444413643057623. The next prime is 444413643057667. The reversal of 444413643057646 is 646750346314444.

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

It is a super-2 number, since 2×444413643057646² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111103410764410 + ... + 111103410764413.

It is an arithmetic number, because the mean of its divisors is an integer number (166655116146618).

Almost surely, 2^{444413643057646} is an apocalyptic number.

444413643057646 is a deficient number, since it is larger than the sum of its proper divisors (222206821528826).

444413643057646 is a wasteful number, since it uses less digits than its factorization.

444413643057646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222206821528825.

The product of its (nonzero) digits is 278691840, while the sum is 61.

The spelling of 444413643057646 in words is "four hundred forty-four trillion, four hundred thirteen billion, six hundred forty-three million, fifty-seven thousand, six hundred forty-six".