1155612853 has 4 divisors (see below), whose sum is σ = 1174557388. Its totient is φ = 1136668320.

The previous prime is 1155612847. The next prime is 1155612863. The reversal of 1155612853 is 3582165511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3582165511 = 4091 ⋅875621.

It can be written as a sum of positive squares in 2 ways, for example, as 41254929 + 1114357924 = 6423^2 + 33382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155612853 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 (1155612833) 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, 9472176 + ... + 9472297.

It is an arithmetic number, because the mean of its divisors is an integer number (293639347).

Almost surely, 2^1155612853 is an apocalyptic number.

It is an amenable number.

1155612853 is a deficient number, since it is larger than the sum of its proper divisors (18944535).

1155612853 is an equidigital number, since it uses as much as digits as its factorization.

1155612853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18944534.

The product of its digits is 36000, while the sum is 37.

The square root of 1155612853 is about 33994.3061850069. The cubic root of 1155612853 is about 1049.3912883012.

The spelling of 1155612853 in words is "one billion, one hundred fifty-five million, six hundred twelve thousand, eight hundred fifty-three".