11155161543 has 4 divisors (see below), whose sum is σ = 14873548728. Its totient is φ = 7436774360.

The previous prime is 11155161527. The next prime is 11155161557. The reversal of 11155161543 is 34516155111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34516155111 = 3 ⋅11505385037.

It is a cyclic number.

It is not a de Polignac number, because 11155161543 - 2⁴ = 11155161527 is a prime.

It is a super-2 number, since 2×11155161543² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11155161503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859193588 + ... + 1859193593.

It is an arithmetic number, because the mean of its divisors is an integer number (3718387182).

Almost surely, 2^11155161543 is an apocalyptic number.

11155161543 is a deficient number, since it is larger than the sum of its proper divisors (3718387185).

11155161543 is an equidigital number, since it uses as much as digits as its factorization.

11155161543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718387184.

The product of its digits is 9000, while the sum is 33.

The spelling of 11155161543 in words is "eleven billion, one hundred fifty-five million, one hundred sixty-one thousand, five hundred forty-three".