91638317103 has 8 divisors (see below), whose sum is σ = 124489789488. Its totient is φ = 59939528064.

The previous prime is 91638317093. The next prime is 91638317107. The reversal of 91638317103 is 30171383619.

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

It is a de Polignac number, because none of the positive numbers 2^k-91638317103 is a prime.

It is a super-2 number, since 2×91638317103² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91638317107) 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, 288170650 + ... + 288170967.

It is an arithmetic number, because the mean of its divisors is an integer number (15561223686).

Almost surely, 2^91638317103 is an apocalyptic number.

91638317103 is a deficient number, since it is larger than the sum of its proper divisors (32851472385).

91638317103 is a wasteful number, since it uses less digits than its factorization.

91638317103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576341673.

The product of its (nonzero) digits is 81648, while the sum is 42.

The spelling of 91638317103 in words is "ninety-one billion, six hundred thirty-eight million, three hundred seventeen thousand, one hundred three".