491220438084 has 72 divisors (see below), whose sum is σ = 1293020339520. Its totient is φ = 157046904000.

The previous prime is 491220438053. The next prime is 491220438133. The reversal of 491220438084 is 480834022194.

491220438084 is a `hidden beast` number, since 49 + 1 + 220 + 4 + 380 + 8 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1400362 + ... + 1715649.

Almost surely, 2^491220438084 is an apocalyptic number.

It is an amenable number.

491220438084 is an abundant number, since it is smaller than the sum of its proper divisors (801799901436).

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

491220438084 is a wasteful number, since it uses less digits than its factorization.

491220438084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116201 (or 3116196 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 491220438084 in words is "four hundred ninety-one billion, two hundred twenty million, four hundred thirty-eight thousand, eighty-four".