79325534581 has 2 divisors, whose sum is σ = 79325534582. Its totient is φ = 79325534580.

The previous prime is 79325534537. The next prime is 79325534593. The reversal of 79325534581 is 18543552397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75125328100 + 4200206481 = 274090^2 + 64809^2 .

It is an emirp because it is prime and its reverse (18543552397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79325534581 - 2¹³ = 79325526389 is a prime.

It is a super-2 number, since 2×79325534581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79325534501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39662767290 + 39662767291.

It is an arithmetic number, because the mean of its divisors is an integer number (39662767291).

Almost surely, 2^79325534581 is an apocalyptic number.

It is an amenable number.

79325534581 is a deficient number, since it is larger than the sum of its proper divisors (1).

79325534581 is an equidigital number, since it uses as much as digits as its factorization.

79325534581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 52.

The spelling of 79325534581 in words is "seventy-nine billion, three hundred twenty-five million, five hundred thirty-four thousand, five hundred eighty-one".