491161926937 has 24 divisors (see below), whose sum is σ = 554412872160. Its totient is φ = 431515684800.

The previous prime is 491161926911. The next prime is 491161926953. The reversal of 491161926937 is 739629161194.

It is a de Polignac number, because none of the positive numbers 2^k-491161926937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491161926907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7780533 + ... + 7843405.

It is an arithmetic number, because the mean of its divisors is an integer number (23100536340).

Almost surely, 2^491161926937 is an apocalyptic number.

It is an amenable number.

491161926937 is a deficient number, since it is larger than the sum of its proper divisors (63250945223).

491161926937 is a wasteful number, since it uses less digits than its factorization.

491161926937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63685 (or 63654 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 58.

The spelling of 491161926937 in words is "four hundred ninety-one billion, one hundred sixty-one million, nine hundred twenty-six thousand, nine hundred thirty-seven".