2105154042045 has 16 divisors (see below), whose sum is σ = 3369105150912. Its totient is φ = 1122462594560.

The previous prime is 2105154042031. The next prime is 2105154042149. The reversal of 2105154042045 is 5402404515012.

It is a happy number.

It is not a de Polignac number, because 2105154042045 - 2⁴ = 2105154042029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105154041997 and 2105154042015.

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, 17828436 + ... + 17946125.

It is an arithmetic number, because the mean of its divisors is an integer number (210569071932).

Almost surely, 2^{2105154042045} is an apocalyptic number.

It is an amenable number.

2105154042045 is a deficient number, since it is larger than the sum of its proper divisors (1263951108867).

2105154042045 is a wasteful number, since it uses less digits than its factorization.

2105154042045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35778492.

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 2105154042045 its reverse (5402404515012), we get a palindrome (7507558557057).

The spelling of 2105154042045 in words is "two trillion, one hundred five billion, one hundred fifty-four million, forty-two thousand, forty-five".