91782991759 has 2 divisors, whose sum is σ = 91782991760. Its totient is φ = 91782991758.

The previous prime is 91782991723. The next prime is 91782991777. The reversal of 91782991759 is 95719928719.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91782991759 - 2¹⁵ = 91782958991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91782991694 and 91782991703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91782991709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45891495879 + 45891495880.

It is an arithmetic number, because the mean of its divisors is an integer number (45891495880).

Almost surely, 2^91782991759 is an apocalyptic number.

91782991759 is a deficient number, since it is larger than the sum of its proper divisors (1).

91782991759 is an equidigital number, since it uses as much as digits as its factorization.

91782991759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25719120, while the sum is 67.

The spelling of 91782991759 in words is "ninety-one billion, seven hundred eighty-two million, nine hundred ninety-one thousand, seven hundred fifty-nine".