11155354553 has 12 divisors (see below), whose sum is σ = 13327359012. Its totient is φ = 9303305760.

The previous prime is 11155354547. The next prime is 11155354583. The reversal of 11155354553 is 35545355111.

It can be written as a sum of positive squares in 2 ways, for example, as 8865540649 + 2289813904 = 94157^2 + 47852^2 .

It is not a de Polignac number, because 11155354553 - 2⁶ = 11155354489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11155354523) 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, 3074678 + ... + 3078303.

It is an arithmetic number, because the mean of its divisors is an integer number (1110613251).

Almost surely, 2^11155354553 is an apocalyptic number.

It is an amenable number.

11155354553 is a deficient number, since it is larger than the sum of its proper divisors (2172004459).

11155354553 is an equidigital number, since it uses as much as digits as its factorization.

11155354553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6153032 (or 6153025 counting only the distinct ones).

The product of its digits is 112500, while the sum is 38.

The spelling of 11155354553 in words is "eleven billion, one hundred fifty-five million, three hundred fifty-four thousand, five hundred fifty-three".