2125255215455 has 4 divisors (see below), whose sum is σ = 2550306258552. Its totient is φ = 1700204172360.

The previous prime is 2125255215449. The next prime is 2125255215481. The reversal of 2125255215455 is 5545125525212.

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

It is a de Polignac number, because none of the positive numbers 2^k-2125255215455 is a prime.

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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212525521541 + ... + 212525521550.

It is an arithmetic number, because the mean of its divisors is an integer number (637576564638).

Almost surely, 2^{2125255215455} is an apocalyptic number.

2125255215455 is a deficient number, since it is larger than the sum of its proper divisors (425051043097).

2125255215455 is an equidigital number, since it uses as much as digits as its factorization.

2125255215455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425051043096.

The product of its digits is 1000000, while the sum is 44.

The spelling of 2125255215455 in words is "two trillion, one hundred twenty-five billion, two hundred fifty-five million, two hundred fifteen thousand, four hundred fifty-five".