68404040052 has 12 divisors (see below), whose sum is σ = 159609426816. Its totient is φ = 22801346680.

The previous prime is 68404040051. The next prime is 68404040059. The reversal of 68404040052 is 25004040486.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×68404040052² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68404039995 and 68404040022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68404040051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2850168324 + ... + 2850168347.

It is an arithmetic number, because the mean of its divisors is an integer number (13300785568).

Almost surely, 2^68404040052 is an apocalyptic number.

It is an amenable number.

68404040052 is an abundant number, since it is smaller than the sum of its proper divisors (91205386764).

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

68404040052 is a wasteful number, since it uses less digits than its factorization.

68404040052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5700336678 (or 5700336676 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The spelling of 68404040052 in words is "sixty-eight billion, four hundred four million, forty thousand, fifty-two".