16444115645 has 8 divisors (see below), whose sum is σ = 19814819640. Its totient is φ = 13100705280.

The previous prime is 16444115629. The next prime is 16444115651. The reversal of 16444115645 is 54651144461.

It can be written as a sum of positive squares in 4 ways, for example, as 1868141284 + 14575974361 = 43222^2 + 120731^2 .

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

It is not a de Polignac number, because 16444115645 - 2⁴ = 16444115629 is a prime.

It is a super-3 number, since 3×16444115645³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6822080 + ... + 6824489.

It is an arithmetic number, because the mean of its divisors is an integer number (2476852455).

Almost surely, 2^16444115645 is an apocalyptic number.

It is an amenable number.

16444115645 is a deficient number, since it is larger than the sum of its proper divisors (3370703995).

16444115645 is a wasteful number, since it uses less digits than its factorization.

16444115645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13646815.

The product of its digits is 230400, while the sum is 41.

The spelling of 16444115645 in words is "sixteen billion, four hundred forty-four million, one hundred fifteen thousand, six hundred forty-five".