1155599955511 has 2 divisors, whose sum is σ = 1155599955512. Its totient is φ = 1155599955510.

The previous prime is 1155599955493. The next prime is 1155599955533.

It is a happy number.

1155599955511 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 1155599955511 - 2⁵ = 1155599955479 is a prime.

It is a super-2 number, since 2×1155599955511² (a number of 25 digits) contains 22 as substring.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1155599955511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155599952511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577799977755 + 577799977756.

It is an arithmetic number, because the mean of its divisors is an integer number (577799977756).

Almost surely, 2^{1155599955511} is an apocalyptic number.

1155599955511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155599955511 is an equidigital number, since it uses as much as digits as its factorization.

1155599955511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11390625, while the sum is 61.

The spelling of 1155599955511 in words is "one trillion, one hundred fifty-five billion, five hundred ninety-nine million, nine hundred fifty-five thousand, five hundred eleven".