115736438978 has 8 divisors (see below), whose sum is σ = 181152687168. Its totient is φ = 55352209924.

The previous prime is 115736438969. The next prime is 115736439017. The reversal of 115736438978 is 879834637511.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 115736438978.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258004726 + ... + 1258004817.

It is an arithmetic number, because the mean of its divisors is an integer number (22644085896).

Almost surely, 2^115736438978 is an apocalyptic number.

115736438978 is a deficient number, since it is larger than the sum of its proper divisors (65416248190).

115736438978 is a wasteful number, since it uses less digits than its factorization.

115736438978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516009568.

The product of its digits is 30481920, while the sum is 62.

The spelling of 115736438978 in words is "one hundred fifteen billion, seven hundred thirty-six million, four hundred thirty-eight thousand, nine hundred seventy-eight".