444539560644 has 63 divisors (see below), whose sum is σ = 1166477251807. Its totient is φ = 148167852264.

The previous prime is 444539560573. The next prime is 444539560687. The reversal of 444539560644 is 446065935444.

The square root of 444539560644 is 666738.

It is a perfect power (a square), and thus also a powerful number.

444539560644 is a `hidden beast` number, since 4 + 4 + 4 + 5 + 39 + 560 + 6 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 35997679 + ... + 36010025.

Almost surely, 2^444539560644 is an apocalyptic number.

444539560644 is the 666738-th square number.

It is an amenable number.

444539560644 is an abundant number, since it is smaller than the sum of its proper divisors (721937691163).

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

444539560644 is an frugal number, since it uses more digits than its factorization.

444539560644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24716 (or 12352 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 54.

The spelling of 444539560644 in words is "four hundred forty-four billion, five hundred thirty-nine million, five hundred sixty thousand, six hundred forty-four".