68697493078824 has 80 divisors (see below), whose sum is σ = 192418207967700. Its totient is φ = 22898971738368.

The previous prime is 68697493078813. The next prime is 68697493078843. The reversal of 68697493078824 is 42887039479686.

68697493078824 is a `hidden beast` number, since 68 + 69 + 7 + 493 + 0 + 7 + 8 + 8 + 2 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61930887465924 + 6766605612900 = 7869618^2 + 2601270^2 .

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 91159282 + ... + 91909790.

Almost surely, 2^{68697493078824} is an apocalyptic number.

It is an amenable number.

68697493078824 is an abundant number, since it is smaller than the sum of its proper divisors (123720714888876).

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

68697493078824 is a wasteful number, since it uses less digits than its factorization.

68697493078824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891784 (or 891771 counting only the distinct ones).

The product of its (nonzero) digits is 7023034368, while the sum is 81.

The spelling of 68697493078824 in words is "sixty-eight trillion, six hundred ninety-seven billion, four hundred ninety-three million, seventy-eight thousand, eight hundred twenty-four".