1155500055511 has 2 divisors, whose sum is σ = 1155500055512. Its totient is φ = 1155500055510.

The previous prime is 1155500055491. The next prime is 1155500055539.

1155500055511 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1155500055511 - 2⁷ = 1155500055383 is a prime.

It is a super-2 number, since 2×1155500055511² (a number of 25 digits) contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155500056511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577750027755 + 577750027756.

It is an arithmetic number, because the mean of its divisors is an integer number (577750027756).

Almost surely, 2^{1155500055511} is an apocalyptic number.

1155500055511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155500055511 is an equidigital number, since it uses as much as digits as its factorization.

1155500055511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15625, while the sum is 34.

The spelling of 1155500055511 in words is "one trillion, one hundred fifty-five billion, five hundred million, fifty-five thousand, five hundred eleven".