2125811028155 has 8 divisors (see below), whose sum is σ = 2551363987200. Its totient is φ = 1700388320256.

The previous prime is 2125811028139. The next prime is 2125811028157. The reversal of 2125811028155 is 5518201185212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2125811028155 - 2⁴ = 2125811028139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2125811028157) 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 7 ways as a sum of consecutive naturals, for example, 32526875 + ... + 32592164.

It is an arithmetic number, because the mean of its divisors is an integer number (318920498400).

Almost surely, 2^{2125811028155} is an apocalyptic number.

2125811028155 is a deficient number, since it is larger than the sum of its proper divisors (425552959045).

2125811028155 is an equidigital number, since it uses as much as digits as its factorization.

2125811028155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65125573.

The product of its (nonzero) digits is 64000, while the sum is 41.

The spelling of 2125811028155 in words is "two trillion, one hundred twenty-five billion, eight hundred eleven million, twenty-eight thousand, one hundred fifty-five".