44712872509 has 2 divisors, whose sum is σ = 44712872510. Its totient is φ = 44712872508.

The previous prime is 44712872441. The next prime is 44712872521. The reversal of 44712872509 is 90527821744.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42598896025 + 2113976484 = 206395^2 + 45978^2 .

It is a cyclic number.

It is not a de Polignac number, because 44712872509 - 2¹⁹ = 44712348221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44712873509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22356436254 + 22356436255.

It is an arithmetic number, because the mean of its divisors is an integer number (22356436255).

Almost surely, 2^44712872509 is an apocalyptic number.

It is an amenable number.

44712872509 is a deficient number, since it is larger than the sum of its proper divisors (1).

44712872509 is an equidigital number, since it uses as much as digits as its factorization.

44712872509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 44712872509 in words is "forty-four billion, seven hundred twelve million, eight hundred seventy-two thousand, five hundred nine".