139231079820 has 120 divisors (see below), whose sum is σ = 499169245344. Its totient is φ = 31824244224.

The previous prime is 139231079791. The next prime is 139231079833. The reversal of 139231079820 is 28970132931.

It is a super-2 number, since 2×139231079820² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6127597 + ... + 6150276.

Almost surely, 2^139231079820 is an apocalyptic number.

139231079820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139231079820 is an abundant number, since it is smaller than the sum of its proper divisors (359938165524).

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

139231079820 is a wasteful number, since it uses less digits than its factorization.

139231079820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12277901 (or 12277890 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 139231079820 in words is "one hundred thirty-nine billion, two hundred thirty-one million, seventy-nine thousand, eight hundred twenty".