491015883630 has 16 divisors (see below), whose sum is σ = 1178438120784. Its totient is φ = 130937568960.

The previous prime is 491015883623. The next prime is 491015883637. The reversal of 491015883630 is 36388510194.

It is an interprime number because it is at equal distance from previous prime (491015883623) and next prime (491015883637).

It is a self number, because there is not a number n which added to its sum of digits gives 491015883630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491015883637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8183598031 + ... + 8183598090.

It is an arithmetic number, because the mean of its divisors is an integer number (73652382549).

Almost surely, 2^491015883630 is an apocalyptic number.

491015883630 is an abundant number, since it is smaller than the sum of its proper divisors (687422237154).

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

491015883630 is a wasteful number, since it uses less digits than its factorization.

491015883630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16367196131.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 491015883630 in words is "four hundred ninety-one billion, fifteen million, eight hundred eighty-three thousand, six hundred thirty".