444545530405021 has 4 divisors (see below), whose sum is σ = 444648031108092. Its totient is φ = 444443029701952.

The previous prime is 444545530405013. The next prime is 444545530405063. The reversal of 444545530405021 is 120504035545444.

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

It can be written as a sum of positive squares in 2 ways, for example, as 172176255344025 + 272369275060996 = 13121595^2 + 16503614^2 .

It is a cyclic number.

It is not a de Polignac number, because 444545530405021 - 2³ = 444545530405013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444545530405421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51250345030 + ... + 51250353703.

It is an arithmetic number, because the mean of its divisors is an integer number (111162007777023).

Almost surely, 2^{444545530405021} is an apocalyptic number.

It is an amenable number.

444545530405021 is a deficient number, since it is larger than the sum of its proper divisors (102500703071).

444545530405021 is a wasteful number, since it uses less digits than its factorization.

444545530405021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102500703070.

The product of its (nonzero) digits is 3840000, while the sum is 46.

The spelling of 444545530405021 in words is "four hundred forty-four trillion, five hundred forty-five billion, five hundred thirty million, four hundred five thousand, twenty-one".