73618835021 has 2 divisors, whose sum is σ = 73618835022. Its totient is φ = 73618835020.

The previous prime is 73618835011. The next prime is 73618835047. The reversal of 73618835021 is 12053881637.

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., 66183222121 + 7435612900 = 257261^2 + 86230^2 .

It is a cyclic number.

It is not a de Polignac number, because 73618835021 - 2⁶ = 73618834957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73618835011) 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, 36809417510 + 36809417511.

It is an arithmetic number, because the mean of its divisors is an integer number (36809417511).

Almost surely, 2^73618835021 is an apocalyptic number.

It is an amenable number.

73618835021 is a deficient number, since it is larger than the sum of its proper divisors (1).

73618835021 is an equidigital number, since it uses as much as digits as its factorization.

73618835021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 73618835021 in words is "seventy-three billion, six hundred eighteen million, eight hundred thirty-five thousand, twenty-one".