491473967064 has 32 divisors (see below), whose sum is σ = 1228773205440. Its totient is φ = 163812884000.

The previous prime is 491473967041. The next prime is 491473967077. The reversal of 491473967064 is 460769374194.

It is a junction number, because it is equal to n+sod(n) for n = 491473966989 and 491473967007.

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, 391482 + ... + 1065929.

It is an arithmetic number, because the mean of its divisors is an integer number (38399162670).

Almost surely, 2^491473967064 is an apocalyptic number.

It is an amenable number.

491473967064 is an abundant number, since it is smaller than the sum of its proper divisors (737299238376).

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

491473967064 is a wasteful number, since it uses less digits than its factorization.

491473967064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471471 (or 1471467 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 491473967064 in words is "four hundred ninety-one billion, four hundred seventy-three million, nine hundred sixty-seven thousand, sixty-four".