77232740136397 has 2 divisors, whose sum is σ = 77232740136398. Its totient is φ = 77232740136396.

The previous prime is 77232740136367. The next prime is 77232740136401. The reversal of 77232740136397 is 79363104723277.

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., 77164875197316 + 67864939081 = 8784354^2 + 260509^2 .

It is a cyclic number.

It is not a de Polignac number, because 77232740136397 - 2¹¹ = 77232740134349 is a prime.

It is a super-2 number, since 2×77232740136397² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77232740136317) 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, 38616370068198 + 38616370068199.

It is an arithmetic number, because the mean of its divisors is an integer number (38616370068199).

Almost surely, 2^{77232740136397} is an apocalyptic number.

It is an amenable number.

77232740136397 is a deficient number, since it is larger than the sum of its proper divisors (1).

77232740136397 is an equidigital number, since it uses as much as digits as its factorization.

77232740136397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56010528, while the sum is 61.

The spelling of 77232740136397 in words is "seventy-seven trillion, two hundred thirty-two billion, seven hundred forty million, one hundred thirty-six thousand, three hundred ninety-seven".