68311554804 has 18 divisors (see below), whose sum is σ = 172676430290. Its totient is φ = 22770518256.

The previous prime is 68311554793. The next prime is 68311554809. The reversal of 68311554804 is 40845511386.

68311554804 is a `hidden beast` number, since 6 + 8 + 3 + 11 + 554 + 80 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 42131667600 + 26179887204 = 205260^2 + 161802^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 68311554804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68311554809) 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, 948771559 + ... + 948771630.

Almost surely, 2^68311554804 is an apocalyptic number.

It is an amenable number.

68311554804 is an abundant number, since it is smaller than the sum of its proper divisors (104364875486).

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

68311554804 is a wasteful number, since it uses less digits than its factorization.

68311554804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897543199 (or 1897543194 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 68311554804 in words is "sixty-eight billion, three hundred eleven million, five hundred fifty-four thousand, eight hundred four".