44462573581 has 2 divisors, whose sum is σ = 44462573582. Its totient is φ = 44462573580.

The previous prime is 44462573557. The next prime is 44462573609. The reversal of 44462573581 is 18537526444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36049097956 + 8413475625 = 189866^2 + 91725^2 .

It is a cyclic number.

It is not a de Polignac number, because 44462573581 - 2¹⁹ = 44462049293 is a prime.

It is a super-2 number, since 2×44462573581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44462573521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22231286790 + 22231286791.

It is an arithmetic number, because the mean of its divisors is an integer number (22231286791).

Almost surely, 2^44462573581 is an apocalyptic number.

It is an amenable number.

44462573581 is a deficient number, since it is larger than the sum of its proper divisors (1).

44462573581 is an equidigital number, since it uses as much as digits as its factorization.

44462573581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3225600, while the sum is 49.

The spelling of 44462573581 in words is "forty-four billion, four hundred sixty-two million, five hundred seventy-three thousand, five hundred eighty-one".