11611219980 has 96 divisors (see below), whose sum is σ = 34452020736. Its totient is φ = 2911804416.

The previous prime is 11611219969. The next prime is 11611220021. The reversal of 11611219980 is 8991211611.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1472007 + ... + 1479873.

It is an arithmetic number, because the mean of its divisors is an integer number (358875216).

Almost surely, 2^11611219980 is an apocalyptic number.

11611219980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11611219980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17226010368).

11611219980 is an abundant number, since it is smaller than the sum of its proper divisors (22840800756).

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

11611219980 is a wasteful number, since it uses less digits than its factorization.

11611219980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9343 (or 9341 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 39.

The spelling of 11611219980 in words is "eleven billion, six hundred eleven million, two hundred nineteen thousand, nine hundred eighty".