44412491561 has 2 divisors, whose sum is σ = 44412491562. Its totient is φ = 44412491560.

The previous prime is 44412491509. The next prime is 44412491581. The reversal of 44412491561 is 16519421444.

44412491561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44360363161 + 52128400 = 210619^2 + 7220^2 .

It is a cyclic number.

It is not a de Polignac number, because 44412491561 - 2¹⁰ = 44412490537 is a prime.

It is not a weakly prime, because it can be changed into another prime (44412491581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22206245780 + 22206245781.

It is an arithmetic number, because the mean of its divisors is an integer number (22206245781).

Almost surely, 2^44412491561 is an apocalyptic number.

It is an amenable number.

44412491561 is a deficient number, since it is larger than the sum of its proper divisors (1).

44412491561 is an equidigital number, since it uses as much as digits as its factorization.

44412491561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The spelling of 44412491561 in words is "forty-four billion, four hundred twelve million, four hundred ninety-one thousand, five hundred sixty-one".