11054501178561 has 27 divisors (see below), whose sum is σ = 16029472095273. Its totient is φ = 7341226848000.

The previous prime is 11054501178491. The next prime is 11054501178593. The reversal of 11054501178561 is 16587110545011.

The square root of 11054501178561 is 3324831.

It is a perfect power (a square), and thus also a powerful number.

11054501178561 is a `hidden beast` number, since 1 + 1 + 0 + 5 + 4 + 5 + 0 + 11 + 78 + 561 = 666.

11054501178561 is digitally balanced in base 2, 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 4 ways, for example, as 7220909480625 + 3833591697936 = 2687175^2 + 1957956^2 .

It is not a de Polignac number, because 11054501178561 - 2³⁷ = 10917062225089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11054501178361) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2762932561 + ... + 2762936561.

Almost surely, 2^{11054501178561} is an apocalyptic number.

11054501178561 is the 3324831-st square number.

11054501178561 is the 1662416-th centered octagonal number.

It is an amenable number.

11054501178561 is a deficient number, since it is larger than the sum of its proper divisors (4974970916712).

11054501178561 is an frugal number, since it uses more digits than its factorization.

11054501178561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8562 (or 4281 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 45.

The spelling of 11054501178561 in words is "eleven trillion, fifty-four billion, five hundred one million, one hundred seventy-eight thousand, five hundred sixty-one".