2155555734511 has 2 divisors, whose sum is σ = 2155555734512. Its totient is φ = 2155555734510.

The previous prime is 2155555734509. The next prime is 2155555734517. The reversal of 2155555734511 is 1154375555512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2155555734511 - 2¹ = 2155555734509 is a prime.

Together with 2155555734509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155555734517) 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 as a sum of consecutive naturals, namely, 1077777867255 + 1077777867256.

It is an arithmetic number, because the mean of its divisors is an integer number (1077777867256).

Almost surely, 2^{2155555734511} is an apocalyptic number.

2155555734511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155555734511 is an equidigital number, since it uses as much as digits as its factorization.

2155555734511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2625000, while the sum is 49.

The spelling of 2155555734511 in words is "two trillion, one hundred fifty-five billion, five hundred fifty-five million, seven hundred thirty-four thousand, five hundred eleven".