44591881644 has 24 divisors (see below), whose sum is σ = 115608582320. Its totient is φ = 14863960512.

The previous prime is 44591881643. The next prime is 44591881657. The reversal of 44591881644 is 44618819544.

44591881644 is a `hidden beast` number, since 4 + 4 + 591 + 8 + 8 + 1 + 6 + 44 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (44591881643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206443789 + ... + 206444004.

Almost surely, 2^44591881644 is an apocalyptic number.

It is an amenable number.

44591881644 is an abundant number, since it is smaller than the sum of its proper divisors (71016700676).

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

44591881644 is a wasteful number, since it uses less digits than its factorization.

44591881644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412887806 (or 412887798 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 54.

The spelling of 44591881644 in words is "forty-four billion, five hundred ninety-one million, eight hundred eighty-one thousand, six hundred forty-four".