2145109502165 has 16 divisors (see below), whose sum is σ = 3036763315200. Its totient is φ = 1423482802560.

The previous prime is 2145109502153. The next prime is 2145109502209. The reversal of 2145109502165 is 5612059015412.

It is a happy number.

It is not a de Polignac number, because 2145109502165 - 2¹⁰ = 2145109501141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 988528640 + ... + 988530809.

It is an arithmetic number, because the mean of its divisors is an integer number (189797707200).

Almost surely, 2^{2145109502165} is an apocalyptic number.

It is an amenable number.

2145109502165 is a deficient number, since it is larger than the sum of its proper divisors (891653813035).

2145109502165 is a wasteful number, since it uses less digits than its factorization.

2145109502165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977059492.

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 2145109502165 in words is "two trillion, one hundred forty-five billion, one hundred nine million, five hundred two thousand, one hundred sixty-five".