91777426463 has 2 divisors, whose sum is σ = 91777426464. Its totient is φ = 91777426462.

The previous prime is 91777426357. The next prime is 91777426501. The reversal of 91777426463 is 36462477719.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91777426463 - 2¹⁸ = 91777164319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91777426399 and 91777426408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91777426163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45888713231 + 45888713232.

It is an arithmetic number, because the mean of its divisors is an integer number (45888713232).

Almost surely, 2^91777426463 is an apocalyptic number.

91777426463 is a deficient number, since it is larger than the sum of its proper divisors (1).

91777426463 is an equidigital number, since it uses as much as digits as its factorization.

91777426463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 56.

The spelling of 91777426463 in words is "ninety-one billion, seven hundred seventy-seven million, four hundred twenty-six thousand, four hundred sixty-three".