43423163642 has 4 divisors (see below), whose sum is σ = 65134745466. Its totient is φ = 21711581820.

The previous prime is 43423163627. The next prime is 43423163647. The reversal of 43423163642 is 24636132434.

43423163642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24636132434 = 2 ⋅12318066217.

It can be written as a sum of positive squares in only one way, i.e., 41529956521 + 1893207121 = 203789^2 + 43511^2 .

It is a super-2 number, since 2×43423163642² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43423163596 and 43423163605.

It is not an unprimeable number, because it can be changed into a prime (43423163647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10855790909 + ... + 10855790912.

Almost surely, 2^43423163642 is an apocalyptic number.

43423163642 is a deficient number, since it is larger than the sum of its proper divisors (21711581824).

43423163642 is a wasteful number, since it uses less digits than its factorization.

43423163642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21711581823.

The product of its digits is 248832, while the sum is 38.

The spelling of 43423163642 in words is "forty-three billion, four hundred twenty-three million, one hundred sixty-three thousand, six hundred forty-two".