45243137861 has 2 divisors, whose sum is σ = 45243137862. Its totient is φ = 45243137860.

The previous prime is 45243137857. The next prime is 45243137893. The reversal of 45243137861 is 16873134254.

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., 43433060836 + 1810077025 = 208406^2 + 42545^2 .

It is a cyclic number.

It is not a de Polignac number, because 45243137861 - 2² = 45243137857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45243187861) 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, 22621568930 + 22621568931.

It is an arithmetic number, because the mean of its divisors is an integer number (22621568931).

Almost surely, 2^45243137861 is an apocalyptic number.

It is an amenable number.

45243137861 is a deficient number, since it is larger than the sum of its proper divisors (1).

45243137861 is an equidigital number, since it uses as much as digits as its factorization.

45243137861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 44.

The spelling of 45243137861 in words is "forty-five billion, two hundred forty-three million, one hundred thirty-seven thousand, eight hundred sixty-one".