68778441980613 has 6 divisors (see below), whose sum is σ = 99346638416454. Its totient is φ = 45852294653736.

The previous prime is 68778441980593. The next prime is 68778441980671. The reversal of 68778441980613 is 31608914487786.

68778441980613 is a `hidden beast` number, since 6 + 8 + 7 + 78 + 4 + 419 + 80 + 61 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58268902427649 + 10509539552964 = 7633407^2 + 3241842^2 .

It is not a de Polignac number, because 68778441980613 - 2⁵ = 68778441980581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68778441984613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3821024554470 + ... + 3821024554487.

It is an arithmetic number, because the mean of its divisors is an integer number (16557773069409).

Almost surely, 2^{68778441980613} is an apocalyptic number.

It is an amenable number.

68778441980613 is a deficient number, since it is larger than the sum of its proper divisors (30568196435841).

68778441980613 is a wasteful number, since it uses less digits than its factorization.

68778441980613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642049108963 (or 7642049108960 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 72.

The spelling of 68778441980613 in words is "sixty-eight trillion, seven hundred seventy-eight billion, four hundred forty-one million, nine hundred eighty thousand, six hundred thirteen".