2165122542426 has 8 divisors (see below), whose sum is σ = 4330245084864. Its totient is φ = 721707514140.

The previous prime is 2165122542403. The next prime is 2165122542433. The reversal of 2165122542426 is 6242452215612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

2165122542426 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180426878530 + ... + 180426878541.

It is an arithmetic number, because the mean of its divisors is an integer number (541280635608).

Almost surely, 2^{2165122542426} is an apocalyptic number.

2165122542426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165122542426 is a wasteful number, since it uses less digits than its factorization.

2165122542426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360853757076.

The product of its digits is 460800, while the sum is 42.

The spelling of 2165122542426 in words is "two trillion, one hundred sixty-five billion, one hundred twenty-two million, five hundred forty-two thousand, four hundred twenty-six".