91641494645 has 8 divisors (see below), whose sum is σ = 112309576704. Its totient is φ = 71753340304.

The previous prime is 91641494641. The next prime is 91641494671. The reversal of 91641494645 is 54649414619.

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 91641494645 - 2² = 91641494641 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91641494641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194981669 + ... + 194982138.

It is an arithmetic number, because the mean of its divisors is an integer number (14038697088).

Almost surely, 2^91641494645 is an apocalyptic number.

It is an amenable number.

91641494645 is a deficient number, since it is larger than the sum of its proper divisors (20668082059).

91641494645 is a wasteful number, since it uses less digits than its factorization.

91641494645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389963859.

The product of its digits is 3732480, while the sum is 53.

The spelling of 91641494645 in words is "ninety-one billion, six hundred forty-one million, four hundred ninety-four thousand, six hundred forty-five".