11308181978 has 8 divisors (see below), whose sum is σ = 17699763168. Its totient is φ = 5408260924.

The previous prime is 11308181977. The next prime is 11308181993. The reversal of 11308181978 is 87918180311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11308181971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122914976 + ... + 122915067.

It is an arithmetic number, because the mean of its divisors is an integer number (2212470396).

Almost surely, 2^11308181978 is an apocalyptic number.

11308181978 is a deficient number, since it is larger than the sum of its proper divisors (6391581190).

11308181978 is a wasteful number, since it uses less digits than its factorization.

11308181978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245830068.

The product of its (nonzero) digits is 96768, while the sum is 47.

The spelling of 11308181978 in words is "eleven billion, three hundred eight million, one hundred eighty-one thousand, nine hundred seventy-eight".