11155204656 has 80 divisors (see below), whose sum is σ = 32414973920. Its totient is φ = 3718389888.

The previous prime is 11155204637. The next prime is 11155204657. The reversal of 11155204656 is 65640255111.

11155204656 is a `hidden beast` number, since 1 + 11 + 552 + 0 + 46 + 56 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11155204656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11155204657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124405 + ... + 194388.

It is an arithmetic number, because the mean of its divisors is an integer number (405187174).

Almost surely, 2^11155204656 is an apocalyptic number.

11155204656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11155204656 is an abundant number, since it is smaller than the sum of its proper divisors (21259769264).

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

11155204656 is an frugal number, since it uses more digits than its factorization.

11155204656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318822 (or 318798 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 11155204656 its reverse (65640255111), we get a palindrome (76795459767).

The spelling of 11155204656 in words is "eleven billion, one hundred fifty-five million, two hundred four thousand, six hundred fifty-six".