91265684449 has 2 divisors, whose sum is σ = 91265684450. Its totient is φ = 91265684448.

The previous prime is 91265684437. The next prime is 91265684507. The reversal of 91265684449 is 94448656219.

It is a happy number.

It is an a-pointer prime, because the next prime (91265684507) can be obtained adding 91265684449 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91208228049 + 57456400 = 302007^2 + 7580^2 .

It is a cyclic number.

It is not a de Polignac number, because 91265684449 - 2¹⁷ = 91265553377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91265684393 and 91265684402.

It is not a weakly prime, because it can be changed into another prime (91265604449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45632842224 + 45632842225.

It is an arithmetic number, because the mean of its divisors is an integer number (45632842225).

Almost surely, 2^91265684449 is an apocalyptic number.

It is an amenable number.

91265684449 is a deficient number, since it is larger than the sum of its proper divisors (1).

91265684449 is an equidigital number, since it uses as much as digits as its factorization.

91265684449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14929920, while the sum is 58.

The spelling of 91265684449 in words is "ninety-one billion, two hundred sixty-five million, six hundred eighty-four thousand, four hundred forty-nine".