2155055715111 has 32 divisors (see below), whose sum is σ = 3172906779840. Its totient is φ = 1292877840384.

The previous prime is 2155055715107. The next prime is 2155055715139. The reversal of 2155055715111 is 1115175505512.

It is not a de Polignac number, because 2155055715111 - 2² = 2155055715107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 2155055715111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155055715101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2995866 + ... + 3644903.

It is an arithmetic number, because the mean of its divisors is an integer number (99153336870).

Almost surely, 2^{2155055715111} is an apocalyptic number.

2155055715111 is a deficient number, since it is larger than the sum of its proper divisors (1017851064729).

2155055715111 is a wasteful number, since it uses less digits than its factorization.

2155055715111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6640995.

The product of its (nonzero) digits is 43750, while the sum is 39.

The spelling of 2155055715111 in words is "two trillion, one hundred fifty-five billion, fifty-five million, seven hundred fifteen thousand, one hundred eleven".