146947644289 has 4 divisors (see below), whose sum is σ = 146965363524. Its totient is φ = 146929925056.

The previous prime is 146947644247. The next prime is 146947644293. The reversal of 146947644289 is 982446749641.

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

It can be written as a sum of positive squares in 2 ways, for example, as 144083253889 + 2864390400 = 379583^2 + 53520^2 .

It is a cyclic number.

It is not a de Polignac number, because 146947644289 - 2¹¹ = 146947642241 is a prime.

It is a super-2 number, since 2×146947644289² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 146947644289.

It is not an unprimeable number, because it can be changed into a prime (146947644209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8847172 + ... + 8863765.

It is an arithmetic number, because the mean of its divisors is an integer number (36741340881).

Almost surely, 2^146947644289 is an apocalyptic number.

It is an amenable number.

146947644289 is a deficient number, since it is larger than the sum of its proper divisors (17719235).

146947644289 is an equidigital number, since it uses as much as digits as its factorization.

146947644289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17719234.

The product of its digits is 83607552, while the sum is 64.

The spelling of 146947644289 in words is "one hundred forty-six billion, nine hundred forty-seven million, six hundred forty-four thousand, two hundred eighty-nine".