8164739493 has 28 divisors (see below), whose sum is σ = 12250409580. Its totient is φ = 5439203136.

The previous prime is 8164739491. The next prime is 8164739519. The reversal of 8164739493 is 3949374618.

It is a happy number.

8164739493 is a `hidden beast` number, since 8 + 164 + 7 + 394 + 93 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 100340289 + 8064399204 = 10017^2 + 89802^2 .

It is not a de Polignac number, because 8164739493 - 2¹ = 8164739491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8164739491) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1274743 + ... + 1281131.

Almost surely, 2^8164739493 is an apocalyptic number.

It is an amenable number.

8164739493 is a deficient number, since it is larger than the sum of its proper divisors (4085670087).

8164739493 is an equidigital number, since it uses as much as digits as its factorization.

8164739493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8160 (or 8145 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 8164739493 is about 90358.9480516457. The cubic root of 8164739493 is about 2013.6351215638.

The spelling of 8164739493 in words is "eight billion, one hundred sixty-four million, seven hundred thirty-nine thousand, four hundred ninety-three".