491231429586 has 12 divisors (see below), whose sum is σ = 1064334764142. Its totient is φ = 163743809856.

The previous prime is 491231429581. The next prime is 491231429593. The reversal of 491231429586 is 685924132194.

It is a happy number.

491231429586 is a `hidden beast` number, since 4 + 9 + 1 + 2 + 31 + 4 + 29 + 586 = 666.

It can be written as a sum of positive squares in only one way, i.e., 491099616225 + 131813361 = 700785^2 + 11481^2 .

It is a super-2 number, since 2×491231429586² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491231429581) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13645317471 + ... + 13645317506.

Almost surely, 2^491231429586 is an apocalyptic number.

491231429586 is an abundant number, since it is smaller than the sum of its proper divisors (573103334556).

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

491231429586 is a wasteful number, since it uses less digits than its factorization.

491231429586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27290634985 (or 27290634982 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 491231429586 in words is "four hundred ninety-one billion, two hundred thirty-one million, four hundred twenty-nine thousand, five hundred eighty-six".