45181397089 has 2 divisors, whose sum is σ = 45181397090. Its totient is φ = 45181397088.

The previous prime is 45181397071. The next prime is 45181397143. The reversal of 45181397089 is 98079318154.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40649414689 + 4531982400 = 201617^2 + 67320^2 .

It is a cyclic number.

It is not a de Polignac number, because 45181397089 - 2⁵ = 45181397057 is a prime.

It is not a weakly prime, because it can be changed into another prime (45181397489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22590698544 + 22590698545.

It is an arithmetic number, because the mean of its divisors is an integer number (22590698545).

Almost surely, 2^45181397089 is an apocalyptic number.

It is an amenable number.

45181397089 is a deficient number, since it is larger than the sum of its proper divisors (1).

45181397089 is an equidigital number, since it uses as much as digits as its factorization.

45181397089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 55.

It can be divided in two parts, 45181 and 397089, that added together give a triangular number (442270 = T₉₄₀).

The spelling of 45181397089 in words is "forty-five billion, one hundred eighty-one million, three hundred ninety-seven thousand, eighty-nine".