2081206508905 has 32 divisors (see below), whose sum is σ = 2604078506880. Its totient is φ = 1595266928640.

The previous prime is 2081206508903. The next prime is 2081206508911. The reversal of 2081206508905 is 5098056021802.

It is not a de Polignac number, because 2081206508905 - 2¹ = 2081206508903 is a prime.

It is a super-3 number, since 3×2081206508905³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2081206508903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40369545 + ... + 40421065.

It is an arithmetic number, because the mean of its divisors is an integer number (81377453340).

Almost surely, 2^{2081206508905} is an apocalyptic number.

It is an amenable number.

2081206508905 is a deficient number, since it is larger than the sum of its proper divisors (522871997975).

2081206508905 is a wasteful number, since it uses less digits than its factorization.

2081206508905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54889.

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 2081206508905 in words is "two trillion, eighty-one billion, two hundred six million, five hundred eight thousand, nine hundred five".