2108923181505 has 48 divisors (see below), whose sum is σ = 4208170472064. Its totient is φ = 957042074880.

The previous prime is 2108923181467. The next prime is 2108923181557. The reversal of 2108923181505 is 5051813298012.

2108923181505 is a `hidden beast` number, since 2 + 108 + 9 + 2 + 31 + 8 + 1 + 505 = 666.

It is not a de Polignac number, because 2108923181505 - 2⁸ = 2108923181249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 24391131 + ... + 24477440.

It is an arithmetic number, because the mean of its divisors is an integer number (87670218168).

Almost surely, 2^{2108923181505} is an apocalyptic number.

It is an amenable number.

2108923181505 is a deficient number, since it is larger than the sum of its proper divisors (2099247290559).

2108923181505 is a wasteful number, since it uses less digits than its factorization.

2108923181505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48868726 (or 48868723 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The spelling of 2108923181505 in words is "two trillion, one hundred eight billion, nine hundred twenty-three million, one hundred eighty-one thousand, five hundred five".