139484579708881 has 81 divisors (see below), whose sum is σ = 164421111861811. Its totient is φ = 118216969446400.

The previous prime is 139484579708839. The next prime is 139484579708893. The reversal of 139484579708881 is 188807975484931.

The square root of 139484579708881 is 11810359.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 42616859929281 + 96867719779600 = 6528159^2 + 9842140^2 .

It is not a de Polignac number, because 139484579708881 - 2⁷ = 139484579708753 is a prime.

It is a super-2 number, since 2×139484579708881² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139484579708795 and 139484579708804.

It is not an unprimeable number, because it can be changed into a prime (139484579708801) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 302569586991 + ... + 302569587451.

Almost surely, 2^{139484579708881} is an apocalyptic number.

139484579708881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139484579708881 is the 11810359-th square number.

139484579708881 is the 5905180-th centered octagonal number.

It is an amenable number.

139484579708881 is a deficient number, since it is larger than the sum of its proper divisors (24936532152930).

139484579708881 is an frugal number, since it uses more digits than its factorization.

139484579708881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 3901685760, while the sum is 82.

The spelling of 139484579708881 in words is "one hundred thirty-nine trillion, four hundred eighty-four billion, five hundred seventy-nine million, seven hundred eight thousand, eight hundred eighty-one".