115519863947218 has 4 divisors (see below), whose sum is σ = 173279795920830. Its totient is φ = 57759931973608.

The previous prime is 115519863947207. The next prime is 115519863947219. The reversal of 115519863947218 is 812749368915511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 82418563070089 + 33101300877129 = 9078467^2 + 5753373^2 .

It is not an unprimeable number, because it can be changed into a prime (115519863947219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28879965986803 + ... + 28879965986806.

Almost surely, 2^{115519863947218} is an apocalyptic number.

115519863947218 is a deficient number, since it is larger than the sum of its proper divisors (57759931973612).

115519863947218 is an equidigital number, since it uses as much as digits as its factorization.

115519863947218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57759931973611.

The product of its digits is 130636800, while the sum is 70.

The spelling of 115519863947218 in words is "one hundred fifteen trillion, five hundred nineteen billion, eight hundred sixty-three million, nine hundred forty-seven thousand, two hundred eighteen".