68077334781 has 24 divisors (see below), whose sum is σ = 98653800960. Its totient is φ = 45237378336.

The previous prime is 68077334777. The next prime is 68077334789. The reversal of 68077334781 is 18743377086.

It is not a de Polignac number, because 68077334781 - 2² = 68077334777 is a prime.

It is a super-2 number, since 2×68077334781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68077334789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10229251 + ... + 10235903.

It is an arithmetic number, because the mean of its divisors is an integer number (4110575040).

Almost surely, 2^68077334781 is an apocalyptic number.

It is an amenable number.

68077334781 is a deficient number, since it is larger than the sum of its proper divisors (30576466179).

68077334781 is a wasteful number, since it uses less digits than its factorization.

68077334781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10185 (or 10182 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 68077334781 in words is "sixty-eight billion, seventy-seven million, three hundred thirty-four thousand, seven hundred eighty-one".