91916769009906 has 24 divisors (see below), whose sum is σ = 199157883868944. Its totient is φ = 30638171565240.

The previous prime is 91916769009893. The next prime is 91916769009917. The reversal of 91916769009906 is 60990096761919.

It is a super-2 number, since 2×91916769009906² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61865280 + ... + 63333611.

It is an arithmetic number, because the mean of its divisors is an integer number (8298245161206).

Almost surely, 2^{91916769009906} is an apocalyptic number.

91916769009906 is an abundant number, since it is smaller than the sum of its proper divisors (107241114859038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91916769009906 is a wasteful number, since it uses less digits than its factorization.

91916769009906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125239686 (or 125239683 counting only the distinct ones).

The product of its (nonzero) digits is 89282088, while the sum is 72.

The spelling of 91916769009906 in words is "ninety-one trillion, nine hundred sixteen billion, seven hundred sixty-nine million, nine thousand, nine hundred six".