11156505354 has 40 divisors (see below), whose sum is σ = 25004861508. Its totient is φ = 3717938880.

The previous prime is 11156505319. The next prime is 11156505361. The reversal of 11156505354 is 45350565111.

11156505354 is a `hidden beast` number, since 1 + 115 + 6 + 5 + 0 + 535 + 4 = 666.

11156505354 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11097569025 + 58936329 = 105345^2 + 7677^2 .

It is a super-2 number, since 2×11156505354² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1327614 + ... + 1335990.

Almost surely, 2^11156505354 is an apocalyptic number.

11156505354 is an abundant number, since it is smaller than the sum of its proper divisors (13848356154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11156505354 is an equidigital number, since it uses as much as digits as its factorization.

11156505354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16612 (or 16603 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 11156505354 in words is "eleven billion, one hundred fifty-six million, five hundred five thousand, three hundred fifty-four".