43144172681 has 4 divisors (see below), whose sum is σ = 43296625872. Its totient is φ = 42991719492.

The previous prime is 43144172657. The next prime is 43144172707. The reversal of 43144172681 is 18627144134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43144172681 - 2²² = 43139978377 is a prime.

It is a super-2 number, since 2×43144172681² (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 (43144172641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76226171 + ... + 76226736.

It is an arithmetic number, because the mean of its divisors is an integer number (10824156468).

Almost surely, 2^43144172681 is an apocalyptic number.

It is an amenable number.

43144172681 is a deficient number, since it is larger than the sum of its proper divisors (152453191).

43144172681 is a wasteful number, since it uses less digits than its factorization.

43144172681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152453190.

The product of its digits is 129024, while the sum is 41.

The spelling of 43144172681 in words is "forty-three billion, one hundred forty-four million, one hundred seventy-two thousand, six hundred eighty-one".