44649185909 has 2 divisors, whose sum is σ = 44649185910. Its totient is φ = 44649185908.

The previous prime is 44649185897. The next prime is 44649185941. The reversal of 44649185909 is 90958194644.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26772158884 + 17877027025 = 163622^2 + 133705^2 .

It is a cyclic number.

It is not a de Polignac number, because 44649185909 - 2²⁰ = 44648137333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44649185809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22324592954 + 22324592955.

It is an arithmetic number, because the mean of its divisors is an integer number (22324592955).

Almost surely, 2^44649185909 is an apocalyptic number.

It is an amenable number.

44649185909 is a deficient number, since it is larger than the sum of its proper divisors (1).

44649185909 is an equidigital number, since it uses as much as digits as its factorization.

44649185909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 59.

The spelling of 44649185909 in words is "forty-four billion, six hundred forty-nine million, one hundred eighty-five thousand, nine hundred nine".