491569152 has 120 divisors (see below), whose sum is σ = 1338466416. Its totient is φ = 160432128.

The previous prime is 491569147. The next prime is 491569157. The reversal of 491569152 is 251965194.

It is an interprime number because it is at equal distance from previous prime (491569147) and next prime (491569157).

It is not an unprimeable number, because it can be changed into a prime (491569157) 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, 3588028 + ... + 3588164.

Almost surely, 2^491569152 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 491569152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669233208).

491569152 is an abundant number, since it is smaller than the sum of its proper divisors (846897264).

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

491569152 is an equidigital number, since it uses as much as digits as its factorization.

491569152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 215 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 491569152 is about 22171.3588216870. The cubic root of 491569152 is about 789.2141691710.

The spelling of 491569152 in words is "four hundred ninety-one million, five hundred sixty-nine thousand, one hundred fifty-two".