1155438653 has 8 divisors (see below), whose sum is σ = 1169001600. Its totient is φ = 1141921008.

The previous prime is 1155438617. The next prime is 1155438721. The reversal of 1155438653 is 3568345511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1155438653 - 2⁸ = 1155438397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155438653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155431653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41408 + ... + 63446.

It is an arithmetic number, because the mean of its divisors is an integer number (146125200).

Almost surely, 2^1155438653 is an apocalyptic number.

It is an amenable number.

1155438653 is a deficient number, since it is larger than the sum of its proper divisors (13562947).

1155438653 is a wasteful number, since it uses less digits than its factorization.

1155438653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22651.

The product of its digits is 216000, while the sum is 41.

The square root of 1155438653 is about 33991.7438946577. The cubic root of 1155438653 is about 1049.3385563538.

The spelling of 1155438653 in words is "one billion, one hundred fifty-five million, four hundred thirty-eight thousand, six hundred fifty-three".