45243137309 has 2 divisors, whose sum is σ = 45243137310. Its totient is φ = 45243137308.

The previous prime is 45243137257. The next prime is 45243137311. The reversal of 45243137309 is 90373134254.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43276480900 + 1966656409 = 208030^2 + 44347^2 .

It is a cyclic number.

It is not a de Polignac number, because 45243137309 - 2²⁴ = 45226360093 is a prime.

It is a super-2 number, since 2×45243137309² (a number of 22 digits) contains 22 as substring.

Together with 45243137311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45243137399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22621568654 + 22621568655.

It is an arithmetic number, because the mean of its divisors is an integer number (22621568655).

Almost surely, 2^45243137309 is an apocalyptic number.

It is an amenable number.

45243137309 is a deficient number, since it is larger than the sum of its proper divisors (1).

45243137309 is an equidigital number, since it uses as much as digits as its factorization.

45243137309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 45243137309 in words is "forty-five billion, two hundred forty-three million, one hundred thirty-seven thousand, three hundred nine".