2540529161 has 4 divisors (see below), whose sum is σ = 2541783300. Its totient is φ = 2539275024.

The previous prime is 2540529157. The next prime is 2540529179. The reversal of 2540529161 is 1619250452.

It is a happy number.

2540529161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2356519936 + 184009225 = 48544^2 + 13565^2 .

It is a cyclic number.

It is not a de Polignac number, because 2540529161 - 2² = 2540529157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540529191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624026 + ... + 628083.

It is an arithmetic number, because the mean of its divisors is an integer number (635445825).

Almost surely, 2^2540529161 is an apocalyptic number.

It is an amenable number.

2540529161 is a deficient number, since it is larger than the sum of its proper divisors (1254139).

2540529161 is a wasteful number, since it uses less digits than its factorization.

2540529161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254138.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 2540529161 is about 50403.6621784568. The cubic root of 2540529161 is about 1364.5037327932.

The spelling of 2540529161 in words is "two billion, five hundred forty million, five hundred twenty-nine thousand, one hundred sixty-one".