44574651661 has 8 divisors (see below), whose sum is σ = 47360005560. Its totient is φ = 41952608704.

The previous prime is 44574651647. The next prime is 44574651673. The reversal of 44574651661 is 16615647544.

It can be written as a sum of positive squares in 4 ways, for example, as 3960310761 + 40614340900 = 62931^2 + 201530^2 .

It is not a de Polignac number, because 44574651661 - 2⁵ = 44574651629 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44574651601) 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, 4531486 + ... + 4541311.

It is an arithmetic number, because the mean of its divisors is an integer number (5920000695).

Almost surely, 2^44574651661 is an apocalyptic number.

It is an amenable number.

44574651661 is a deficient number, since it is larger than the sum of its proper divisors (2785353899).

44574651661 is an frugal number, since it uses more digits than its factorization.

44574651661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9072848 (or 9072814 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 49.

The spelling of 44574651661 in words is "forty-four billion, five hundred seventy-four million, six hundred fifty-one thousand, six hundred sixty-one".