2545155155021 has 2 divisors, whose sum is σ = 2545155155022. Its totient is φ = 2545155155020.

The previous prime is 2545155154973. The next prime is 2545155155029. The reversal of 2545155155021 is 1205515515452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1300170062500 + 1244985092521 = 1140250^2 + 1115789^2 .

It is a cyclic number.

It is not a de Polignac number, because 2545155155021 - 2²⁶ = 2545088046157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2545155155021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2545155155029) by changing a digit.

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 as a sum of consecutive naturals, namely, 1272577577510 + 1272577577511.

It is an arithmetic number, because the mean of its divisors is an integer number (1272577577511).

Almost surely, 2^{2545155155021} is an apocalyptic number.

It is an amenable number.

2545155155021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545155155021 is an equidigital number, since it uses as much as digits as its factorization.

2545155155021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250000, while the sum is 41.

The spelling of 2545155155021 in words is "two trillion, five hundred forty-five billion, one hundred fifty-five million, one hundred fifty-five thousand, twenty-one".