1195105685815 has 4 divisors (see below), whose sum is σ = 1434126822984. Its totient is φ = 956084548648.

The previous prime is 1195105685789. The next prime is 1195105685833. The reversal of 1195105685815 is 5185865015911.

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

It is a cyclic number.

It is not a de Polignac number, because 1195105685815 - 2¹¹ = 1195105683767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119510568577 + ... + 119510568586.

It is an arithmetic number, because the mean of its divisors is an integer number (358531705746).

Almost surely, 2^{1195105685815} is an apocalyptic number.

1195105685815 is a deficient number, since it is larger than the sum of its proper divisors (239021137169).

1195105685815 is an equidigital number, since it uses as much as digits as its factorization.

1195105685815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239021137168.

The product of its (nonzero) digits is 2160000, while the sum is 55.

It can be divided in two parts, 11951056 and 85815, that added together give a triangular number (12036871 = T₄₉₀₆).

The spelling of 1195105685815 in words is "one trillion, one hundred ninety-five billion, one hundred five million, six hundred eighty-five thousand, eight hundred fifteen".