2729912518081 has 6 divisors (see below), whose sum is σ = 3175612521090. Its totient is φ = 2339925015456.

The previous prime is 2729912518063. The next prime is 2729912518103. The reversal of 2729912518081 is 1808152199272.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2685635941681 + 44276576400 = 1638791^2 + 210420^2 .

It is not a de Polignac number, because 2729912518081 - 2⁹ = 2729912517569 is a prime.

It is a super-3 number, since 3×2729912518081³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2729912518001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27856250136 + ... + 27856250233.

It is an arithmetic number, because the mean of its divisors is an integer number (529268753515).

Almost surely, 2^{2729912518081} is an apocalyptic number.

It is an amenable number.

2729912518081 is a deficient number, since it is larger than the sum of its proper divisors (445700003009).

2729912518081 is an equidigital number, since it uses as much as digits as its factorization.

2729912518081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55712500383 (or 55712500376 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 55.

The spelling of 2729912518081 in words is "two trillion, seven hundred twenty-nine billion, nine hundred twelve million, five hundred eighteen thousand, eighty-one".