2140838523081 has 6 divisors (see below), whose sum is σ = 3092322311130. Its totient is φ = 1427225682048.

The previous prime is 2140838522969. The next prime is 2140838523091. The reversal of 2140838523081 is 1803258380412.

2140838523081 is a `hidden beast` number, since 2 + 1 + 40 + 8 + 3 + 8 + 523 + 0 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2137783197456 + 3055325625 = 1462116^2 + 55275^2 .

It is not a de Polignac number, because 2140838523081 - 2¹⁵ = 2140838490313 is a prime.

It is a super-2 number, since 2×2140838523081² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2140838523091) 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, 118935473496 + ... + 118935473513.

It is an arithmetic number, because the mean of its divisors is an integer number (515387051855).

Almost surely, 2^{2140838523081} is an apocalyptic number.

It is an amenable number.

2140838523081 is a deficient number, since it is larger than the sum of its proper divisors (951483788049).

2140838523081 is a wasteful number, since it uses less digits than its factorization.

2140838523081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237870947015 (or 237870947012 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 2140838523081 in words is "two trillion, one hundred forty billion, eight hundred thirty-eight million, five hundred twenty-three thousand, eighty-one".