172493936077 has 2 divisors, whose sum is σ = 172493936078. Its totient is φ = 172493936076.

The previous prime is 172493936029. The next prime is 172493936149. The reversal of 172493936077 is 770639394271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149785254441 + 22708681636 = 387021^2 + 150694^2 .

It is an emirp because it is prime and its reverse (770639394271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172493936077 - 2²³ = 172485547469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172493936177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86246968038 + 86246968039.

It is an arithmetic number, because the mean of its divisors is an integer number (86246968039).

Almost surely, 2^172493936077 is an apocalyptic number.

It is an amenable number.

172493936077 is a deficient number, since it is larger than the sum of its proper divisors (1).

172493936077 is an equidigital number, since it uses as much as digits as its factorization.

172493936077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12002256, while the sum is 58.

The spelling of 172493936077 in words is "one hundred seventy-two billion, four hundred ninety-three million, nine hundred thirty-six thousand, seventy-seven".