68013367733781 has 48 divisors (see below), whose sum is σ = 105877269628416. Its totient is φ = 41966309756448.

The previous prime is 68013367733749. The next prime is 68013367733803. The reversal of 68013367733781 is 18733776331086.

68013367733781 is a `hidden beast` number, since 6 + 8 + 0 + 133 + 67 + 73 + 378 + 1 = 666.

It is not a de Polignac number, because 68013367733781 - 2⁵ = 68013367733749 is a prime.

It is a super-2 number, since 2×68013367733781² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68013367733881) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34753635 + ... + 36658448.

It is an arithmetic number, because the mean of its divisors is an integer number (2205776450592).

Almost surely, 2^{68013367733781} is an apocalyptic number.

It is an amenable number.

68013367733781 is a deficient number, since it is larger than the sum of its proper divisors (37863901894635).

68013367733781 is a wasteful number, since it uses less digits than its factorization.

68013367733781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71412262 (or 71412259 counting only the distinct ones).

The product of its (nonzero) digits is 64012032, while the sum is 63.

The spelling of 68013367733781 in words is "sixty-eight trillion, thirteen billion, three hundred sixty-seven million, seven hundred thirty-three thousand, seven hundred eighty-one".