68139164532 has 24 divisors (see below), whose sum is σ = 159509279776. Its totient is φ = 22639069728.

The previous prime is 68139164531. The next prime is 68139164543. The reversal of 68139164532 is 23546193186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68139164531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9244303 + ... + 9251670.

Almost surely, 2^68139164532 is an apocalyptic number.

It is an amenable number.

68139164532 is an abundant number, since it is smaller than the sum of its proper divisors (91370115244).

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

68139164532 is a wasteful number, since it uses less digits than its factorization.

68139164532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18496287 (or 18496285 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The spelling of 68139164532 in words is "sixty-eight billion, one hundred thirty-nine million, one hundred sixty-four thousand, five hundred thirty-two".