91869745669 has 8 divisors (see below), whose sum is σ = 98967127392. Its totient is φ = 84776718000.

The previous prime is 91869745657. The next prime is 91869745697. The reversal of 91869745669 is 96654796819.

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

It is not a de Polignac number, because 91869745669 - 2²⁹ = 91332874757 is a prime.

It is a super-2 number, since 2×91869745669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91869745598 and 91869745607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91869745469) 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, 1044619 + ... + 1129144.

It is an arithmetic number, because the mean of its divisors is an integer number (12370890924).

Almost surely, 2^91869745669 is an apocalyptic number.

It is an amenable number.

91869745669 is a deficient number, since it is larger than the sum of its proper divisors (7097381723).

91869745669 is a wasteful number, since it uses less digits than its factorization.

91869745669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177027.

The product of its digits is 176359680, while the sum is 70.

The spelling of 91869745669 in words is "ninety-one billion, eight hundred sixty-nine million, seven hundred forty-five thousand, six hundred sixty-nine".