2542906165 has 4 divisors (see below), whose sum is σ = 3051487404. Its totient is φ = 2034324928.

The previous prime is 2542906153. The next prime is 2542906193. The reversal of 2542906165 is 5616092452.

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 1976513764 + 566392401 = 44458^2 + 23799^2 .

It is a cyclic number.

It is not a de Polignac number, because 2542906165 - 2¹⁵ = 2542873397 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 254290612 + ... + 254290621.

It is an arithmetic number, because the mean of its divisors is an integer number (762871851).

Almost surely, 2^2542906165 is an apocalyptic number.

It is an amenable number.

2542906165 is a deficient number, since it is larger than the sum of its proper divisors (508581239).

2542906165 is an equidigital number, since it uses as much as digits as its factorization.

2542906165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508581238.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 2542906165 is about 50427.2363410885. The cubic root of 2542906165 is about 1364.9291585735.

The spelling of 2542906165 in words is "two billion, five hundred forty-two million, nine hundred six thousand, one hundred sixty-five".