2765555671 has 4 divisors (see below), whose sum is σ = 2767699144. Its totient is φ = 2763412200.

The previous prime is 2765555641. The next prime is 2765555701. The reversal of 2765555671 is 1765555672.

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

It is an interprime number because it is at equal distance from previous prime (2765555641) and next prime (2765555701).

It is a cyclic number.

It is not a de Polignac number, because 2765555671 - 2⁷ = 2765555543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2765555641) 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, 1069800 + ... + 1072381.

It is an arithmetic number, because the mean of its divisors is an integer number (691924786).

Almost surely, 2^2765555671 is an apocalyptic number.

2765555671 is a deficient number, since it is larger than the sum of its proper divisors (2143473).

2765555671 is a wasteful number, since it uses less digits than its factorization.

2765555671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143472.

The product of its digits is 2205000, while the sum is 49.

The square root of 2765555671 is about 52588.5507596473. The cubic root of 2765555671 is about 1403.6563727988.

Subtracting from 2765555671 its reverse (1765555672), we obtain a palindrome (999999999).

The spelling of 2765555671 in words is "two billion, seven hundred sixty-five million, five hundred fifty-five thousand, six hundred seventy-one".