139221506860 has 24 divisors (see below), whose sum is σ = 292385854656. Its totient is φ = 55684661760.

The previous prime is 139221506857. The next prime is 139221506867. The reversal of 139221506860 is 68605122931.

139221506860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (139221506867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52189 + ... + 530251.

It is an arithmetic number, because the mean of its divisors is an integer number (12182743944).

Almost surely, 2^139221506860 is an apocalyptic number.

139221506860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139221506860 is an abundant number, since it is smaller than the sum of its proper divisors (153164347796).

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

139221506860 is a wasteful number, since it uses less digits than its factorization.

139221506860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492633 (or 492631 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 139221506860 in words is "one hundred thirty-nine billion, two hundred twenty-one million, five hundred six thousand, eight hundred sixty".