2541771661 has 12 divisors (see below), whose sum is σ = 3002546880. Its totient is φ = 2132953680.

The previous prime is 2541771611. The next prime is 2541771689. The reversal of 2541771661 is 1661771452.

It is not a de Polignac number, because 2541771661 - 2¹¹ = 2541769613 is a prime.

It is a super-3 number, since 3×2541771661³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541771611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 681781 + ... + 685498.

It is an arithmetic number, because the mean of its divisors is an integer number (250212240).

Almost surely, 2^2541771661 is an apocalyptic number.

It is an amenable number.

2541771661 is a deficient number, since it is larger than the sum of its proper divisors (460775219).

2541771661 is a wasteful number, since it uses less digits than its factorization.

2541771661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367316 (or 1367303 counting only the distinct ones).

The product of its digits is 70560, while the sum is 40.

The square root of 2541771661 is about 50415.9861651044. The cubic root of 2541771661 is about 1364.7261430951.

The spelling of 2541771661 in words is "two billion, five hundred forty-one million, seven hundred seventy-one thousand, six hundred sixty-one".