44847666621 has 6 divisors (see below), whose sum is σ = 64779962910. Its totient is φ = 29898444408.

The previous prime is 44847666601. The next prime is 44847666659. The reversal of 44847666621 is 12666674844.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 32062841721 + 12784824900 = 179061^2 + 113070^2 .

It is not a de Polignac number, because 44847666621 - 2⁹ = 44847666109 is a prime.

It is a super-2 number, since 2×44847666621² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44847666601) 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 5 ways as a sum of consecutive naturals, for example, 2491537026 + ... + 2491537043.

It is an arithmetic number, because the mean of its divisors is an integer number (10796660485).

Almost surely, 2^44847666621 is an apocalyptic number.

It is an amenable number.

44847666621 is a deficient number, since it is larger than the sum of its proper divisors (19932296289).

44847666621 is a wasteful number, since it uses less digits than its factorization.

44847666621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4983074075 (or 4983074072 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 54.

The spelling of 44847666621 in words is "forty-four billion, eight hundred forty-seven million, six hundred sixty-six thousand, six hundred twenty-one".