91353450577 has 2 divisors, whose sum is σ = 91353450578. Its totient is φ = 91353450576.

The previous prime is 91353450569. The next prime is 91353450599. The reversal of 91353450577 is 77505435319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91141194816 + 212255761 = 301896^2 + 14569^2 .

It is a cyclic number.

It is not a de Polignac number, because 91353450577 - 2³ = 91353450569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91353450577.

It is not a weakly prime, because it can be changed into another prime (91353450277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45676725288 + 45676725289.

It is an arithmetic number, because the mean of its divisors is an integer number (45676725289).

Almost surely, 2^91353450577 is an apocalyptic number.

It is an amenable number.

91353450577 is a deficient number, since it is larger than the sum of its proper divisors (1).

91353450577 is an equidigital number, since it uses as much as digits as its factorization.

91353450577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1984500, while the sum is 49.

The spelling of 91353450577 in words is "ninety-one billion, three hundred fifty-three million, four hundred fifty thousand, five hundred seventy-seven".