2161444414436 has 6 divisors (see below), whose sum is σ = 3782527725270. Its totient is φ = 1080722207216.

The previous prime is 2161444414421. The next prime is 2161444414453. The reversal of 2161444414436 is 6344144441612.

It can be written as a sum of positive squares in only one way, i.e., 1719392297536 + 442052116900 = 1311256^2 + 664870^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270180551801 + ... + 270180551808.

It is an arithmetic number, because the mean of its divisors is an integer number (630421287545).

Almost surely, 2^{2161444414436} is an apocalyptic number.

It is an amenable number.

2161444414436 is a deficient number, since it is larger than the sum of its proper divisors (1621083310834).

2161444414436 is a wasteful number, since it uses less digits than its factorization.

2161444414436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540361103613 (or 540361103611 counting only the distinct ones).

The product of its digits is 884736, while the sum is 44.

The spelling of 2161444414436 in words is "two trillion, one hundred sixty-one billion, four hundred forty-four million, four hundred fourteen thousand, four hundred thirty-six".