45437681609 has 2 divisors, whose sum is σ = 45437681610. Its totient is φ = 45437681608.

The previous prime is 45437681563. The next prime is 45437681659. The reversal of 45437681609 is 90618673454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43783470025 + 1654211584 = 209245^2 + 40672^2 .

It is a cyclic number.

It is not a de Polignac number, because 45437681609 - 2¹² = 45437677513 is a prime.

It is not a weakly prime, because it can be changed into another prime (45437681659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22718840804 + 22718840805.

It is an arithmetic number, because the mean of its divisors is an integer number (22718840805).

Almost surely, 2^45437681609 is an apocalyptic number.

It is an amenable number.

45437681609 is a deficient number, since it is larger than the sum of its proper divisors (1).

45437681609 is an equidigital number, since it uses as much as digits as its factorization.

45437681609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 45437681609 in words is "forty-five billion, four hundred thirty-seven million, six hundred eighty-one thousand, six hundred nine".