72686421880273 has 2 divisors, whose sum is σ = 72686421880274. Its totient is φ = 72686421880272.

The previous prime is 72686421880201. The next prime is 72686421880327. The reversal of 72686421880273 is 37208812468627.

Together with next prime (72686421880327) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63199208742849 + 9487213137424 = 7949793^2 + 3080132^2 .

It is an emirp because it is prime and its reverse (37208812468627) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72686421880273 - 2¹³ = 72686421872081 is a prime.

It is not a weakly prime, because it can be changed into another prime (72686421280273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36343210940136 + 36343210940137.

It is an arithmetic number, because the mean of its divisors is an integer number (36343210940137).

Almost surely, 2^{72686421880273} is an apocalyptic number.

It is an amenable number.

72686421880273 is a deficient number, since it is larger than the sum of its proper divisors (1).

72686421880273 is an equidigital number, since it uses as much as digits as its factorization.

72686421880273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86704128, while the sum is 64.

The spelling of 72686421880273 in words is "seventy-two trillion, six hundred eighty-six billion, four hundred twenty-one million, eight hundred eighty thousand, two hundred seventy-three".