2164782468466 has 4 divisors (see below), whose sum is σ = 3247173702702. Its totient is φ = 1082391234232.

The previous prime is 2164782468449. The next prime is 2164782468473. The reversal of 2164782468466 is 6648642874612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2045915426025 + 118867042441 = 1430355^2 + 344771^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2164782468398 and 2164782468407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541195617115 + ... + 541195617118.

Almost surely, 2^{2164782468466} is an apocalyptic number.

2164782468466 is a deficient number, since it is larger than the sum of its proper divisors (1082391234236).

2164782468466 is a wasteful number, since it uses less digits than its factorization.

2164782468466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082391234235.

The product of its digits is 148635648, while the sum is 64.

The spelling of 2164782468466 in words is "two trillion, one hundred sixty-four billion, seven hundred eighty-two million, four hundred sixty-eight thousand, four hundred sixty-six".