43919427643 has 16 divisors (see below), whose sum is σ = 54148427200. Its totient is φ = 34689171456.

The previous prime is 43919427569. The next prime is 43919427679. The reversal of 43919427643 is 34672491934.

43919427643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 43919427643 - 2⁹ = 43919427131 is a prime.

It is a super-2 number, since 2×43919427643² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43919427943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 365718 + ... + 470731.

It is an arithmetic number, because the mean of its divisors is an integer number (3384276700).

Almost surely, 2^43919427643 is an apocalyptic number.

43919427643 is a deficient number, since it is larger than the sum of its proper divisors (10228999557).

43919427643 is a wasteful number, since it uses less digits than its factorization.

43919427643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837046.

The product of its digits is 3919104, while the sum is 52.

The spelling of 43919427643 in words is "forty-three billion, nine hundred nineteen million, four hundred twenty-seven thousand, six hundred forty-three".