2108163786554 has 72 divisors (see below), whose sum is σ = 3946585033440. Its totient is φ = 839794187232.

The previous prime is 2108163786479. The next prime is 2108163786571. The reversal of 2108163786554 is 4556873618012.

It is a self number, because there is not a number n which added to its sum of digits gives 2108163786554.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5028827 + ... + 5431889.

It is an arithmetic number, because the mean of its divisors is an integer number (54813681020).

Almost surely, 2^{2108163786554} is an apocalyptic number.

2108163786554 is a deficient number, since it is larger than the sum of its proper divisors (1838421246886).

2108163786554 is a wasteful number, since it uses less digits than its factorization.

2108163786554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403204 (or 403144 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 2108163786554 in words is "two trillion, one hundred eight billion, one hundred sixty-three million, seven hundred eighty-six thousand, five hundred fifty-four".