491729646036 has 24 divisors (see below), whose sum is σ = 1148492972704. Its totient is φ = 163749339360.

The previous prime is 491729646029. The next prime is 491729646137. The reversal of 491729646036 is 630646927194.

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, 20055070 + ... + 20079573.

Almost surely, 2^491729646036 is an apocalyptic number.

It is an amenable number.

491729646036 is an abundant number, since it is smaller than the sum of its proper divisors (656763326668).

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

491729646036 is a wasteful number, since it uses less digits than its factorization.

491729646036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40135671 (or 40135669 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 57.

The spelling of 491729646036 in words is "four hundred ninety-one billion, seven hundred twenty-nine million, six hundred forty-six thousand, thirty-six".