91568034457 has 8 divisors (see below), whose sum is σ = 91904897480. Its totient is φ = 91231660800.

The previous prime is 91568034451. The next prime is 91568034527. The reversal of 91568034457 is 75443086519.

It can be written as a sum of positive squares in 4 ways, for example, as 578931721 + 90989102736 = 24061^2 + 301644^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91568034457 - 2¹⁵ = 91568001689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91568034451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254707 + ... + 498007.

It is an arithmetic number, because the mean of its divisors is an integer number (11488112185).

Almost surely, 2^91568034457 is an apocalyptic number.

It is an amenable number.

91568034457 is a deficient number, since it is larger than the sum of its proper divisors (336863023).

91568034457 is a wasteful number, since it uses less digits than its factorization.

91568034457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244683.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 91568034457 in words is "ninety-one billion, five hundred sixty-eight million, thirty-four thousand, four hundred fifty-seven".