45249821693 has 2 divisors, whose sum is σ = 45249821694. Its totient is φ = 45249821692.

The previous prime is 45249821647. The next prime is 45249821803. The reversal of 45249821693 is 39612894254.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44283730969 + 966090724 = 210437^2 + 31082^2 .

It is a cyclic number.

It is not a de Polignac number, because 45249821693 - 2⁶ = 45249821629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45249821623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22624910846 + 22624910847.

It is an arithmetic number, because the mean of its divisors is an integer number (22624910847).

Almost surely, 2^45249821693 is an apocalyptic number.

It is an amenable number.

45249821693 is a deficient number, since it is larger than the sum of its proper divisors (1).

45249821693 is an equidigital number, since it uses as much as digits as its factorization.

45249821693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3732480, while the sum is 53.

The spelling of 45249821693 in words is "forty-five billion, two hundred forty-nine million, eight hundred twenty-one thousand, six hundred ninety-three".