68158767744 has 96 divisors (see below), whose sum is σ = 202897293300. Its totient is φ = 21936144384.

The previous prime is 68158767731. The next prime is 68158767749. The reversal of 68158767744 is 44776785186.

68158767744 is a `hidden beast` number, since 6 + 8 + 1 + 587 + 6 + 7 + 7 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 65884622400 + 2274145344 = 256680^2 + 47688^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (68158767749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 986689 + ... + 1053504.

Almost surely, 2^68158767744 is an apocalyptic number.

68158767744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

68158767744 is an abundant number, since it is smaller than the sum of its proper divisors (134738525556).

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

68158767744 is a wasteful number, since it uses less digits than its factorization.

68158767744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040242 (or 2040227 counting only the distinct ones).

The product of its digits is 63221760, while the sum is 63.

The spelling of 68158767744 in words is "sixty-eight billion, one hundred fifty-eight million, seven hundred sixty-seven thousand, seven hundred forty-four".