2555011665 has 12 divisors (see below), whose sum is σ = 4428686964. Its totient is φ = 1362672864.

The previous prime is 2555011663. The next prime is 2555011673. The reversal of 2555011665 is 5661105552.

It can be written as a sum of positive squares in 2 ways, for example, as 1399283649 + 1155728016 = 37407^2 + 33996^2 .

It is not a de Polignac number, because 2555011665 - 2¹ = 2555011663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2555011663) 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, 28388974 + ... + 28389063.

It is an arithmetic number, because the mean of its divisors is an integer number (369057247).

Almost surely, 2^2555011665 is an apocalyptic number.

It is an amenable number.

2555011665 is a deficient number, since it is larger than the sum of its proper divisors (1873675299).

2555011665 is a wasteful number, since it uses less digits than its factorization.

2555011665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56778048 (or 56778045 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 2555011665 is about 50547.1232119099. The cubic root of 2555011665 is about 1367.0916449189.

The spelling of 2555011665 in words is "two billion, five hundred fifty-five million, eleven thousand, six hundred sixty-five".