2161717143426 has 12 divisors (see below), whose sum is σ = 4683720477462. Its totient is φ = 720572381136.

The previous prime is 2161717143413. The next prime is 2161717143433. The reversal of 2161717143426 is 6243417171612.

2161717143426 is a `hidden beast` number, since 2 + 1 + 6 + 17 + 171 + 43 + 426 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1882562364225 + 279154779201 = 1372065^2 + 528351^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60047698411 + ... + 60047698446.

Almost surely, 2^{2161717143426} is an apocalyptic number.

2161717143426 is an abundant number, since it is smaller than the sum of its proper divisors (2522003334036).

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

2161717143426 is a wasteful number, since it uses less digits than its factorization.

2161717143426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120095396865 (or 120095396862 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The spelling of 2161717143426 in words is "two trillion, one hundred sixty-one billion, seven hundred seventeen million, one hundred forty-three thousand, four hundred twenty-six".