146644681 has 8 divisors (see below), whose sum is σ = 147754280. Its totient is φ = 145539072.

The previous prime is 146644651. The next prime is 146644699. The reversal of 146644681 is 186446641.

It can be written as a sum of positive squares in 4 ways, for example, as 839056 + 145805625 = 916^2 + 12075^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 146644681 - 2²⁵ = 113090249 is a prime.

It is a super-2 number, since 2×146644681² = 43009324931183522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146644621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129325 + ... + 130453.

It is an arithmetic number, because the mean of its divisors is an integer number (18469285).

Almost surely, 2^146644681 is an apocalyptic number.

It is an amenable number.

146644681 is a deficient number, since it is larger than the sum of its proper divisors (1109599).

146644681 is a wasteful number, since it uses less digits than its factorization.

146644681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995.

The product of its digits is 110592, while the sum is 40.

The square root of 146644681 is about 12109.6936790325. The cubic root of 146644681 is about 527.3376405605.

The spelling of 146644681 in words is "one hundred forty-six million, six hundred forty-four thousand, six hundred eighty-one".