1156145543 has 12 divisors (see below), whose sum is σ = 1353819312. Its totient is φ = 984412800.

The previous prime is 1156145519. The next prime is 1156145561. The reversal of 1156145543 is 3455416511.

It is not a de Polignac number, because 1156145543 - 2²⁰ = 1155096967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156145513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70730 + ... + 85527.

It is an arithmetic number, because the mean of its divisors is an integer number (112818276).

Almost surely, 2^1156145543 is an apocalyptic number.

1156145543 is a deficient number, since it is larger than the sum of its proper divisors (197673769).

1156145543 is a wasteful number, since it uses less digits than its factorization.

1156145543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156422 (or 156415 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 1156145543 is about 34002.1402708712. The cubic root of 1156145543 is about 1049.5525056079.

The spelling of 1156145543 in words is "one billion, one hundred fifty-six million, one hundred forty-five thousand, five hundred forty-three".