2155434032611 has 16 divisors (see below), whose sum is σ = 2309207201280. Its totient is φ = 2006892796480.

The previous prime is 2155434032551. The next prime is 2155434032669. The reversal of 2155434032611 is 1162304345512.

It is a cyclic number.

It is not a de Polignac number, because 2155434032611 - 2³³ = 2146844098019 is a prime.

It is a super-2 number, since 2×2155434032611² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155434032671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2162071 + ... + 2997568.

It is an arithmetic number, because the mean of its divisors is an integer number (144325450080).

Almost surely, 2^{2155434032611} is an apocalyptic number.

2155434032611 is a deficient number, since it is larger than the sum of its proper divisors (153773168669).

2155434032611 is a wasteful number, since it uses less digits than its factorization.

2155434032611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160146.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 2155434032611 in words is "two trillion, one hundred fifty-five billion, four hundred thirty-four million, thirty-two thousand, six hundred eleven".