77425566593 has 2 divisors, whose sum is σ = 77425566594. Its totient is φ = 77425566592.

The previous prime is 77425566511. The next prime is 77425566679. The reversal of 77425566593 is 39566552477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64654758529 + 12770808064 = 254273^2 + 113008^2 .

It is a cyclic number.

It is not a de Polignac number, because 77425566593 - 2²⁴ = 77408789377 is a prime.

It is a super-3 number, since 3×77425566593³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (77425566503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38712783296 + 38712783297.

It is an arithmetic number, because the mean of its divisors is an integer number (38712783297).

Almost surely, 2^77425566593 is an apocalyptic number.

It is an amenable number.

77425566593 is a deficient number, since it is larger than the sum of its proper divisors (1).

77425566593 is an equidigital number, since it uses as much as digits as its factorization.

77425566593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628000, while the sum is 59.

The spelling of 77425566593 in words is "seventy-seven billion, four hundred twenty-five million, five hundred sixty-six thousand, five hundred ninety-three".