11100609978 has 32 divisors (see below), whose sum is σ = 22338011520. Its totient is φ = 3677446080.

The previous prime is 11100609973. The next prime is 11100609979. The reversal of 11100609978 is 87990600111.

It is not an unprimeable number, because it can be changed into a prime (11100609973) 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, 1214088 + ... + 1223196.

It is an arithmetic number, because the mean of its divisors is an integer number (698062860).

Almost surely, 2^11100609978 is an apocalyptic number.

11100609978 is an abundant number, since it is smaller than the sum of its proper divisors (11237401542).

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

11100609978 is a wasteful number, since it uses less digits than its factorization.

11100609978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342.

The product of its (nonzero) digits is 27216, while the sum is 42.

The spelling of 11100609978 in words is "eleven billion, one hundred million, six hundred nine thousand, nine hundred seventy-eight".