2040507561 has 8 divisors (see below), whose sum is σ = 2794208704. Its totient is φ = 1323572400.

The previous prime is 2040507533. The next prime is 2040507611. The reversal of 2040507561 is 1657050402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2040507561 - 2¹³ = 2040499369 is a prime.

It is a super-2 number, since 2×2040507561² = 8327342212996337442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2040502561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9191365 + ... + 9191586.

It is an arithmetic number, because the mean of its divisors is an integer number (349276088).

Almost surely, 2^2040507561 is an apocalyptic number.

It is an amenable number.

2040507561 is a deficient number, since it is larger than the sum of its proper divisors (753701143).

2040507561 is a wasteful number, since it uses less digits than its factorization.

2040507561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18382991.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 2040507561 is about 45171.9776078046. The cubic root of 2040507561 is about 1268.3703156756.

Adding to 2040507561 its reverse (1657050402), we get a palindrome (3697557963).

The spelling of 2040507561 in words is "two billion, forty million, five hundred seven thousand, five hundred sixty-one".