491569648 has 10 divisors (see below), whose sum is σ = 952416224. Its totient is φ = 245784816.

The previous prime is 491569619. The next prime is 491569693. The reversal of 491569648 is 846965194.

It is a happy number.

It is a super-3 number, since 3×491569648³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 491569595 and 491569604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15361536 + ... + 15361567.

Almost surely, 2^491569648 is an apocalyptic number.

It is an amenable number.

491569648 is a deficient number, since it is larger than the sum of its proper divisors (460846576).

491569648 is a wasteful number, since it uses less digits than its factorization.

491569648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30723111 (or 30723105 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The square root of 491569648 is about 22171.3700072864. The cubic root of 491569648 is about 789.2144346136.

The spelling of 491569648 in words is "four hundred ninety-one million, five hundred sixty-nine thousand, six hundred forty-eight".