11155842978 has 32 divisors (see below), whose sum is σ = 25541136384. Its totient is φ = 3182125392.

The previous prime is 11155842961. The next prime is 11155843033. The reversal of 11155842978 is 87924855111.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11155842978.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193300 + ... + 244287.

It is an arithmetic number, because the mean of its divisors is an integer number (798160512).

Almost surely, 2^11155842978 is an apocalyptic number.

11155842978 is an abundant number, since it is smaller than the sum of its proper divisors (14385293406).

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

11155842978 is a wasteful number, since it uses less digits than its factorization.

11155842978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438206.

The product of its digits is 806400, while the sum is 51.

The spelling of 11155842978 in words is "eleven billion, one hundred fifty-five million, eight hundred forty-two thousand, nine hundred seventy-eight".