491374616536 has 16 divisors (see below), whose sum is σ = 975523136040. Its totient is φ = 231235113600.

The previous prime is 491374616527. The next prime is 491374616539. The reversal of 491374616536 is 635616473194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491374616539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1806524190 + ... + 1806524461.

Almost surely, 2^491374616536 is an apocalyptic number.

It is an amenable number.

491374616536 is a deficient number, since it is larger than the sum of its proper divisors (484148519504).

491374616536 is a wasteful number, since it uses less digits than its factorization.

491374616536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613048674 (or 3613048670 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 55.

The spelling of 491374616536 in words is "four hundred ninety-one billion, three hundred seventy-four million, six hundred sixteen thousand, five hundred thirty-six".