2094506512081 has 3 divisors (see below), whose sum is σ = 2094507959323. Its totient is φ = 2094505064840.

The previous prime is 2094506512031. The next prime is 2094506512129. The reversal of 2094506512081 is 1802156054902.

The square root of 2094506512081 is 1447241.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 542887502481 + 1551619009600 = 736809^2 + 1245640^2 .

It is not a de Polignac number, because 2094506512081 - 2²¹ = 2094504414929 is a prime.

It is a super-3 number, since 3×2094506512081³ (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 (2094506512001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 723621 + ... + 2170861.

Almost surely, 2^{2094506512081} is an apocalyptic number.

2094506512081 is the 1447241-st square number.

2094506512081 is the 723621-st centered octagonal number.

It is an amenable number.

2094506512081 is a deficient number, since it is larger than the sum of its proper divisors (1447242).

2094506512081 is an frugal number, since it uses more digits than its factorization.

2094506512081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2894482 (or 1447241 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 2094506512081 in words is "two trillion, ninety-four billion, five hundred six million, five hundred twelve thousand, eighty-one".