115665338394 has 16 divisors (see below), whose sum is σ = 257034085440. Its totient is φ = 38555112780.

The previous prime is 115665338381. The next prime is 115665338401. The reversal of 115665338394 is 493833566511.

115665338394 is a `hidden beast` number, since 1 + 15 + 6 + 6 + 533 + 8 + 3 + 94 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 2141950711 = 115665338394 / (1 + 1 + 5 + 6 + 6 + 5 + 3 + 3 + 8 + 3 + 9 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 115665338394.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070975302 + ... + 1070975409.

It is an arithmetic number, because the mean of its divisors is an integer number (16064630340).

Almost surely, 2^115665338394 is an apocalyptic number.

115665338394 is an abundant number, since it is smaller than the sum of its proper divisors (141368747046).

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

115665338394 is a wasteful number, since it uses less digits than its factorization.

115665338394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141950722 (or 2141950716 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The spelling of 115665338394 in words is "one hundred fifteen billion, six hundred sixty-five million, three hundred thirty-eight thousand, three hundred ninety-four".