11205542555 has 4 divisors (see below), whose sum is σ = 13446651072. Its totient is φ = 8964434040.

The previous prime is 11205542489. The next prime is 11205542573. The reversal of 11205542555 is 55524550211.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11205542555 - 2²⁸ = 10937107099 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120554251 + ... + 1120554260.

It is an arithmetic number, because the mean of its divisors is an integer number (3361662768).

Almost surely, 2^11205542555 is an apocalyptic number.

11205542555 is a deficient number, since it is larger than the sum of its proper divisors (2241108517).

11205542555 is an equidigital number, since it uses as much as digits as its factorization.

11205542555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241108516.

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 11205542555 in words is "eleven billion, two hundred five million, five hundred forty-two thousand, five hundred fifty-five".