11161216054980 has 144 divisors (see below), whose sum is σ = 36467278009344. Its totient is φ = 2755082753280.

The previous prime is 11161216054921. The next prime is 11161216054981. The reversal of 11161216054980 is 8945061216111.

11161216054980 is a `hidden beast` number, since 1 + 1 + 1 + 6 + 1 + 21 + 6 + 0 + 549 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (11161216054981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43354659 + ... + 43611338.

It is an arithmetic number, because the mean of its divisors is an integer number (253244986176).

Almost surely, 2^{11161216054980} is an apocalyptic number.

11161216054980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11161216054980 is an abundant number, since it is smaller than the sum of its proper divisors (25306061954364).

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

11161216054980 is a wasteful number, since it uses less digits than its factorization.

11161216054980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86966066 (or 86966061 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 11161216054980 in words is "eleven trillion, one hundred sixty-one billion, two hundred sixteen million, fifty-four thousand, nine hundred eighty".