2040164561 has 16 divisors (see below), whose sum is σ = 2147969664. Its totient is φ = 1934025984.

The previous prime is 2040164531. The next prime is 2040164597. The reversal of 2040164561 is 1654610402.

It is a cyclic number.

It is not a de Polignac number, because 2040164561 - 2¹⁴ = 2040148177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2040164531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2087705 + ... + 2088681.

It is an arithmetic number, because the mean of its divisors is an integer number (134248104).

Almost surely, 2^2040164561 is an apocalyptic number.

It is an amenable number.

2040164561 is a deficient number, since it is larger than the sum of its proper divisors (107805103).

2040164561 is a wasteful number, since it uses less digits than its factorization.

2040164561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2040164561 is about 45168.1808466978. The cubic root of 2040164561 is about 1268.2992426078.

Adding to 2040164561 its reverse (1654610402), we get a palindrome (3694774963).

The spelling of 2040164561 in words is "two billion, forty million, one hundred sixty-four thousand, five hundred sixty-one".