2541662765 has 4 divisors (see below), whose sum is σ = 3049995324. Its totient is φ = 2033330208.

The previous prime is 2541662729. The next prime is 2541662777. The reversal of 2541662765 is 5672661452.

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 259403236 + 2282259529 = 16106^2 + 47773^2 .

It is a cyclic number.

It is not a de Polignac number, because 2541662765 - 2⁶ = 2541662701 is a prime.

It is a super-2 number, since 2×2541662765² = 12920099221974890450, which contains 22 as substring.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254166272 + ... + 254166281.

It is an arithmetic number, because the mean of its divisors is an integer number (762498831).

Almost surely, 2^2541662765 is an apocalyptic number.

It is an amenable number.

2541662765 is a deficient number, since it is larger than the sum of its proper divisors (508332559).

2541662765 is an equidigital number, since it uses as much as digits as its factorization.

2541662765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508332558.

The product of its digits is 604800, while the sum is 44.

The square root of 2541662765 is about 50414.9061786294. The cubic root of 2541662765 is about 1364.7066533638.

The spelling of 2541662765 in words is "two billion, five hundred forty-one million, six hundred sixty-two thousand, seven hundred sixty-five".