11109956155 has 4 divisors (see below), whose sum is σ = 13331947392. Its totient is φ = 8887964920.

The previous prime is 11109956141. The next prime is 11109956167. The reversal of 11109956155 is 55165990111.

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

It is not a de Polignac number, because 11109956155 - 2¹³ = 11109947963 is a prime.

It is a super-2 number, since 2×11109956155² (a number of 21 digits) contains 22 as substring.

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, 1110995611 + ... + 1110995620.

It is an arithmetic number, because the mean of its divisors is an integer number (3332986848).

Almost surely, 2^11109956155 is an apocalyptic number.

11109956155 is a deficient number, since it is larger than the sum of its proper divisors (2221991237).

11109956155 is an equidigital number, since it uses as much as digits as its factorization.

11109956155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221991236.

The product of its (nonzero) digits is 60750, while the sum is 43.

The spelling of 11109956155 in words is "eleven billion, one hundred nine million, nine hundred fifty-six thousand, one hundred fifty-five".