44394289623 has 8 divisors (see below), whose sum is σ = 65769318000. Its totient is φ = 29596193064.

The previous prime is 44394289543. The next prime is 44394289631. The reversal of 44394289623 is 32698249344.

44394289623 is a `hidden beast` number, since 4 + 4 + 3 + 9 + 4 + 2 + 8 + 9 + 623 = 666.

It is not a de Polignac number, because 44394289623 - 2⁸ = 44394289367 is a prime.

It is a super-2 number, since 2×44394289623² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 44394289623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44394289123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822116448 + ... + 822116501.

It is an arithmetic number, because the mean of its divisors is an integer number (8221164750).

Almost surely, 2^44394289623 is an apocalyptic number.

44394289623 is a deficient number, since it is larger than the sum of its proper divisors (21375028377).

44394289623 is a wasteful number, since it uses less digits than its factorization.

44394289623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644232958 (or 1644232952 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 54.

The spelling of 44394289623 in words is "forty-four billion, three hundred ninety-four million, two hundred eighty-nine thousand, six hundred twenty-three".