43644142147 has 4 divisors (see below), whose sum is σ = 45941202280. Its totient is φ = 41347082016.

The previous prime is 43644142141. The next prime is 43644142159. The reversal of 43644142147 is 74124144634.

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

It is a cyclic number.

It is not a de Polignac number, because 43644142147 - 2¹⁹ = 43643617859 is a prime.

It is a super-2 number, since 2×43644142147² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43644142141) 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, 1148530038 + ... + 1148530075.

It is an arithmetic number, because the mean of its divisors is an integer number (11485300570).

Almost surely, 2^43644142147 is an apocalyptic number.

43644142147 is a deficient number, since it is larger than the sum of its proper divisors (2297060133).

43644142147 is a wasteful number, since it uses less digits than its factorization.

43644142147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297060132.

The product of its digits is 258048, while the sum is 40.

The spelling of 43644142147 in words is "forty-three billion, six hundred forty-four million, one hundred forty-two thousand, one hundred forty-seven".