77752510397 has 2 divisors, whose sum is σ = 77752510398. Its totient is φ = 77752510396.

The previous prime is 77752510379. The next prime is 77752510439. The reversal of 77752510397 is 79301525777.

Together with previous prime (77752510379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69243185881 + 8509324516 = 263141^2 + 92246^2 .

It is a cyclic number.

It is not a de Polignac number, because 77752510397 - 2⁶ = 77752510333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77752510327) 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, 38876255198 + 38876255199.

It is an arithmetic number, because the mean of its divisors is an integer number (38876255199).

Almost surely, 2^77752510397 is an apocalyptic number.

It is an amenable number.

77752510397 is a deficient number, since it is larger than the sum of its proper divisors (1).

77752510397 is an equidigital number, since it uses as much as digits as its factorization.

77752510397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3241350, while the sum is 53.

The spelling of 77752510397 in words is "seventy-seven billion, seven hundred fifty-two million, five hundred ten thousand, three hundred ninety-seven".