491161926936 has 32 divisors (see below), whose sum is σ = 1233042508800. Its totient is φ = 163035616800.

The previous prime is 491161926911. The next prime is 491161926953. The reversal of 491161926936 is 639629161194.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42808240 + ... + 42819711.

It is an arithmetic number, because the mean of its divisors is an integer number (38532578400).

Almost surely, 2^491161926936 is an apocalyptic number.

It is an amenable number.

491161926936 is an abundant number, since it is smaller than the sum of its proper divisors (741880581864).

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

491161926936 is a wasteful number, since it uses less digits than its factorization.

491161926936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85628199 (or 85628195 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 57.

The spelling of 491161926936 in words is "four hundred ninety-one billion, one hundred sixty-one million, nine hundred twenty-six thousand, nine hundred thirty-six".