68933555778 has 16 divisors (see below), whose sum is σ = 137959719840. Its totient is φ = 22962417216.

The previous prime is 68933555741. The next prime is 68933555791. The reversal of 68933555778 is 87755533986.

It is a super-2 number, since 2×68933555778² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3849000 + ... + 3866867.

It is an arithmetic number, because the mean of its divisors is an integer number (8622482490).

Almost surely, 2^68933555778 is an apocalyptic number.

68933555778 is an abundant number, since it is smaller than the sum of its proper divisors (69026164062).

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

68933555778 is a wasteful number, since it uses less digits than its factorization.

68933555778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7717361.

The product of its digits is 190512000, while the sum is 66.

The spelling of 68933555778 in words is "sixty-eight billion, nine hundred thirty-three million, five hundred fifty-five thousand, seven hundred seventy-eight".