491430199002 has 32 divisors (see below), whose sum is σ = 991582771200. Its totient is φ = 162358898688.

The previous prime is 491430198977. The next prime is 491430199003. The reversal of 491430199002 is 200991034194.

It is a super-2 number, since 2×491430199002² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491430199003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449274 + ... + 1088442.

It is an arithmetic number, because the mean of its divisors is an integer number (30986961600).

Almost surely, 2^491430199002 is an apocalyptic number.

491430199002 is an abundant number, since it is smaller than the sum of its proper divisors (500152572198).

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

491430199002 is a wasteful number, since it uses less digits than its factorization.

491430199002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640310.

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 491430199002 in words is "four hundred ninety-one billion, four hundred thirty million, one hundred ninety-nine thousand, two".