75547302727321 has 2 divisors, whose sum is σ = 75547302727322. Its totient is φ = 75547302727320.

The previous prime is 75547302727297. The next prime is 75547302727343. The reversal of 75547302727321 is 12372720374557.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70702619995225 + 4844682732096 = 8408485^2 + 2201064^2 .

It is a cyclic number.

It is not a de Polignac number, because 75547302727321 - 2¹⁵ = 75547302694553 is a prime.

It is not a weakly prime, because it can be changed into another prime (75547302724321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37773651363660 + 37773651363661.

It is an arithmetic number, because the mean of its divisors is an integer number (37773651363661).

Almost surely, 2^{75547302727321} is an apocalyptic number.

It is an amenable number.

75547302727321 is a deficient number, since it is larger than the sum of its proper divisors (1).

75547302727321 is an equidigital number, since it uses as much as digits as its factorization.

75547302727321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17287200, while the sum is 55.

The spelling of 75547302727321 in words is "seventy-five trillion, five hundred forty-seven billion, three hundred two million, seven hundred twenty-seven thousand, three hundred twenty-one".