297493509640 has 16 divisors (see below), whose sum is σ = 669360396780. Its totient is φ = 118997403840.

The previous prime is 297493509631. The next prime is 297493509673. The reversal of 297493509640 is 46905394792.

It can be written as a sum of positive squares in 2 ways, for example, as 293943971556 + 3549538084 = 542166^2 + 59578^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3718668831 + ... + 3718668910.

Almost surely, 2^297493509640 is an apocalyptic number.

297493509640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

297493509640 is an abundant number, since it is smaller than the sum of its proper divisors (371866887140).

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

297493509640 is a wasteful number, since it uses less digits than its factorization.

297493509640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7437337752 (or 7437337748 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 58.

The spelling of 297493509640 in words is "two hundred ninety-seven billion, four hundred ninety-three million, five hundred nine thousand, six hundred forty".