2566555102155 has 64 divisors (see below), whose sum is σ = 4620419905536. Its totient is φ = 1205855040000.

The previous prime is 2566555102147. The next prime is 2566555102157. The reversal of 2566555102155 is 5512015556652.

It is not a de Polignac number, because 2566555102155 - 2³ = 2566555102147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2566555102157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 855136 + ... + 2421645.

It is an arithmetic number, because the mean of its divisors is an integer number (72194061024).

Almost surely, 2^{2566555102155} is an apocalyptic number.

2566555102155 is a deficient number, since it is larger than the sum of its proper divisors (2053864803381).

2566555102155 is a wasteful number, since it uses less digits than its factorization.

2566555102155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276948.

The product of its (nonzero) digits is 2250000, while the sum is 48.

The spelling of 2566555102155 in words is "two trillion, five hundred sixty-six billion, five hundred fifty-five million, one hundred two thousand, one hundred fifty-five".