115878916221 has 8 divisors (see below), whose sum is σ = 156811269984. Its totient is φ = 76099586640.

The previous prime is 115878916201. The next prime is 115878916247. The reversal of 115878916221 is 122619878511.

It is a happy number.

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

It is not a de Polignac number, because 115878916221 - 2⁶ = 115878916157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115878916201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288255810 + ... + 288256211.

It is an arithmetic number, because the mean of its divisors is an integer number (19601408748).

Almost surely, 2^115878916221 is an apocalyptic number.

It is an amenable number.

115878916221 is a deficient number, since it is larger than the sum of its proper divisors (40932353763).

115878916221 is an equidigital number, since it uses as much as digits as its factorization.

115878916221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576512091.

The product of its digits is 483840, while the sum is 51.

The spelling of 115878916221 in words is "one hundred fifteen billion, eight hundred seventy-eight million, nine hundred sixteen thousand, two hundred twenty-one".