491039612432 has 80 divisors (see below), whose sum is σ = 1018275600000. Its totient is φ = 228695685120.

The previous prime is 491039612417. The next prime is 491039612467. The reversal of 491039612432 is 234216930194.

It is a super-2 number, since 2×491039612432² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92698808 + ... + 92704104.

It is an arithmetic number, because the mean of its divisors is an integer number (12728445000).

Almost surely, 2^491039612432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491039612432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509137800000).

491039612432 is an abundant number, since it is smaller than the sum of its proper divisors (527235987568).

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

491039612432 is a wasteful number, since it uses less digits than its factorization.

491039612432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384 (or 10378 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 491039612432 in words is "four hundred ninety-one billion, thirty-nine million, six hundred twelve thousand, four hundred thirty-two".