2134040661 has 20 divisors (see below), whose sum is σ = 3297818700. Its totient is φ = 1373633856.

The previous prime is 2134040659. The next prime is 2134040669. The reversal of 2134040661 is 1660404312.

2134040661 is a `hidden beast` number, since 213 + 40 + 406 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1338462225 + 795578436 = 36585^2 + 28206^2 .

It is not a de Polignac number, because 2134040661 - 2¹ = 2134040659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2134040669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 451896 + ... + 456593.

It is an arithmetic number, because the mean of its divisors is an integer number (164890935).

Almost surely, 2^2134040661 is an apocalyptic number.

It is an amenable number.

2134040661 is a deficient number, since it is larger than the sum of its proper divisors (1163778039).

2134040661 is an equidigital number, since it uses as much as digits as its factorization.

2134040661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908530 (or 908521 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 2134040661 is about 46195.6779471846. The cubic root of 2134040661 is about 1287.4614382016.

Adding to 2134040661 its reverse (1660404312), we get a palindrome (3794444973).

It can be divided in two parts, 21340 and 40661, that added together give a square (62001 = 249²).

The spelling of 2134040661 in words is "two billion, one hundred thirty-four million, forty thousand, six hundred sixty-one".