2164981694 has 4 divisors (see below), whose sum is σ = 3247472544. Its totient is φ = 1082490846.

The previous prime is 2164981661. The next prime is 2164981717. The reversal of 2164981694 is 4961894612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541245422 + ... + 541245425.

It is an arithmetic number, because the mean of its divisors is an integer number (811868136).

Almost surely, 2^2164981694 is an apocalyptic number.

2164981694 is a deficient number, since it is larger than the sum of its proper divisors (1082490850).

2164981694 is a wasteful number, since it uses less digits than its factorization.

2164981694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082490849.

The product of its digits is 746496, while the sum is 50.

The square root of 2164981694 is about 46529.3637824546. The cubic root of 2164981694 is about 1293.6538227056.

The spelling of 2164981694 in words is "two billion, one hundred sixty-four million, nine hundred eighty-one thousand, six hundred ninety-four".