68398086132 has 72 divisors (see below), whose sum is σ = 175423366664. Its totient is φ = 22466543616.

The previous prime is 68398086101. The next prime is 68398086137. The reversal of 68398086132 is 23168089386.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6235629156 + 62162456976 = 78966^2 + 249324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68398086137) 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, 3018798 + ... + 3041370.

Almost surely, 2^68398086132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68398086132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87711683332).

68398086132 is an abundant number, since it is smaller than the sum of its proper divisors (107025280532).

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

68398086132 is a wasteful number, since it uses less digits than its factorization.

68398086132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23809 (or 23804 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 68398086132 in words is "sixty-eight billion, three hundred ninety-eight million, eighty-six thousand, one hundred thirty-two".