109434021815 has 16 divisors (see below), whose sum is σ = 131947679808. Its totient is φ = 87130127616.

The previous prime is 109434021787. The next prime is 109434021833. The reversal of 109434021815 is 518120434901.

It is a cyclic number.

It is not a de Polignac number, because 109434021815 - 2¹⁶ = 109433956279 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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1038227 + ... + 1138763.

It is an arithmetic number, because the mean of its divisors is an integer number (8246729988).

Almost surely, 2^109434021815 is an apocalyptic number.

109434021815 is a deficient number, since it is larger than the sum of its proper divisors (22513657993).

109434021815 is a wasteful number, since it uses less digits than its factorization.

109434021815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101578.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 109434021815 in words is "one hundred nine billion, four hundred thirty-four million, twenty-one thousand, eight hundred fifteen".