491486330436 has 48 divisors (see below), whose sum is σ = 1183908999168. Its totient is φ = 158528714400.

The previous prime is 491486330347. The next prime is 491486330477. The reversal of 491486330436 is 634033684194.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4187001 + ... + 4302783.

It is an arithmetic number, because the mean of its divisors is an integer number (24664770816).

Almost surely, 2^491486330436 is an apocalyptic number.

It is an amenable number.

491486330436 is an abundant number, since it is smaller than the sum of its proper divisors (692422668732).

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

491486330436 is a wasteful number, since it uses less digits than its factorization.

491486330436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127232 (or 127230 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 51.

The spelling of 491486330436 in words is "four hundred ninety-one billion, four hundred eighty-six million, three hundred thirty thousand, four hundred thirty-six".