44661221587 has 2 divisors, whose sum is σ = 44661221588. Its totient is φ = 44661221586.

The previous prime is 44661221531. The next prime is 44661221621. The reversal of 44661221587 is 78512216644.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 44661221587 - 2¹⁹ = 44660697299 is a prime.

It is a super-2 number, since 2×44661221587² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (44661222587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22330610793 + 22330610794.

It is an arithmetic number, because the mean of its divisors is an integer number (22330610794).

Almost surely, 2^44661221587 is an apocalyptic number.

44661221587 is a deficient number, since it is larger than the sum of its proper divisors (1).

44661221587 is an equidigital number, since it uses as much as digits as its factorization.

44661221587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 46.

The spelling of 44661221587 in words is "forty-four billion, six hundred sixty-one million, two hundred twenty-one thousand, five hundred eighty-seven".