73227471899861 has 2 divisors, whose sum is σ = 73227471899862. Its totient is φ = 73227471899860.

The previous prime is 73227471899837. The next prime is 73227471899891. The reversal of 73227471899861 is 16899817472237.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57532452550225 + 15695019349636 = 7585015^2 + 3961694^2 .

It is a cyclic number.

It is not a de Polignac number, because 73227471899861 - 2⁶ = 73227471899797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73227471899821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36613735949930 + 36613735949931.

It is an arithmetic number, because the mean of its divisors is an integer number (36613735949931).

Almost surely, 2^{73227471899861} is an apocalyptic number.

It is an amenable number.

73227471899861 is a deficient number, since it is larger than the sum of its proper divisors (1).

73227471899861 is an equidigital number, since it uses as much as digits as its factorization.

73227471899861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 512096256, while the sum is 74.

The spelling of 73227471899861 in words is "seventy-three trillion, two hundred twenty-seven billion, four hundred seventy-one million, eight hundred ninety-nine thousand, eight hundred sixty-one".