68220463546624 has 27 divisors (see below), whose sum is σ = 136174704697983. Its totient is φ = 34110165696768.

The previous prime is 68220463546619. The next prime is 68220463546663. The reversal of 68220463546624 is 42664536402286.

It is a happy number.

The square root of 68220463546624 is 8259568.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 131894977 + ... + 132411199.

Almost surely, 2^{68220463546624} is an apocalyptic number.

68220463546624 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

68220463546624 is the 8259568-th square number.

It is an amenable number.

68220463546624 is a deficient number, since it is larger than the sum of its proper divisors (67954241151359).

68220463546624 is an frugal number, since it uses more digits than its factorization.

68220463546624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032462 (or 516225 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 58.

The spelling of 68220463546624 in words is "sixty-eight trillion, two hundred twenty billion, four hundred sixty-three million, five hundred forty-six thousand, six hundred twenty-four".