77317487372591 has 2 divisors, whose sum is σ = 77317487372592. Its totient is φ = 77317487372590.

The previous prime is 77317487372579. The next prime is 77317487372669. The reversal of 77317487372591 is 19527378471377.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77317487372591 - 2⁴⁶ = 6948743194927 is a prime.

It is a super-2 number, since 2×77317487372591² (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 (77317487372561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38658743686295 + 38658743686296.

It is an arithmetic number, because the mean of its divisors is an integer number (38658743686296).

Almost surely, 2^{77317487372591} is an apocalyptic number.

77317487372591 is a deficient number, since it is larger than the sum of its proper divisors (1).

77317487372591 is an equidigital number, since it uses as much as digits as its factorization.

77317487372591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435637440, while the sum is 71.

The spelling of 77317487372591 in words is "seventy-seven trillion, three hundred seventeen billion, four hundred eighty-seven million, three hundred seventy-two thousand, five hundred ninety-one".