91603251848641 has 8 divisors (see below), whose sum is σ = 98651009094120. Its totient is φ = 84555687925632.

The previous prime is 91603251848621. The next prime is 91603251848663. The reversal of 91603251848641 is 14684815230619.

It can be written as a sum of positive squares in 4 ways, for example, as 4613027657616 + 86990224191025 = 2147796^2 + 9326855^2 .

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 91603251848641 - 2⁵ = 91603251848609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91603251848611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47345746 + ... + 49242523.

It is an arithmetic number, because the mean of its divisors is an integer number (12331376136765).

Almost surely, 2^{91603251848641} is an apocalyptic number.

It is an amenable number.

91603251848641 is a deficient number, since it is larger than the sum of its proper divisors (7047757245479).

91603251848641 is a wasteful number, since it uses less digits than its factorization.

91603251848641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96661235.

The product of its (nonzero) digits is 9953280, while the sum is 58.

The spelling of 91603251848641 in words is "ninety-one trillion, six hundred three billion, two hundred fifty-one million, eight hundred forty-eight thousand, six hundred forty-one".