11011551156 has 120 divisors (see below), whose sum is σ = 30371929280. Its totient is φ = 3469246848.

The previous prime is 11011551149. The next prime is 11011551211. The reversal of 11011551156 is 65115511011.

11011551156 is a `hidden beast` number, since 1 + 101 + 1 + 551 + 1 + 5 + 6 = 666.

It is a super-2 number, since 2×11011551156² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2996136 + ... + 2999808.

Almost surely, 2^11011551156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11011551156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15185964640).

11011551156 is an abundant number, since it is smaller than the sum of its proper divisors (19360378124).

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

11011551156 is a wasteful number, since it uses less digits than its factorization.

11011551156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195 (or 4184 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 27.

The spelling of 11011551156 in words is "eleven billion, eleven million, five hundred fifty-one thousand, one hundred fifty-six".