2155739268191 has 4 divisors (see below), whose sum is σ = 2155756789584. Its totient is φ = 2155721746800.

The previous prime is 2155739268127. The next prime is 2155739268197. The reversal of 2155739268191 is 1918629375512.

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

It is a cyclic number.

It is not a de Polignac number, because 2155739268191 - 2⁶ = 2155739268127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155739268191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155739268197) 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 3 ways as a sum of consecutive naturals, for example, 8574830 + ... + 8822651.

It is an arithmetic number, because the mean of its divisors is an integer number (538939197396).

Almost surely, 2^{2155739268191} is an apocalyptic number.

2155739268191 is a deficient number, since it is larger than the sum of its proper divisors (17521393).

2155739268191 is a wasteful number, since it uses less digits than its factorization.

2155739268191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17521392.

The product of its digits is 8164800, while the sum is 59.

The spelling of 2155739268191 in words is "two trillion, one hundred fifty-five billion, seven hundred thirty-nine million, two hundred sixty-eight thousand, one hundred ninety-one".