42971620042 has 8 divisors (see below), whose sum is σ = 69415693956. Its totient is φ = 19833055392.

The previous prime is 42971619997. The next prime is 42971620049. The reversal of 42971620042 is 24002617924.

It can be written as a sum of positive squares in 2 ways, for example, as 42885853921 + 85766121 = 207089^2 + 9261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 42971619983 and 42971620010.

It is not an unprimeable number, because it can be changed into a prime (42971620049) 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, 826377283 + ... + 826377334.

Almost surely, 2^42971620042 is an apocalyptic number.

42971620042 is a deficient number, since it is larger than the sum of its proper divisors (26444073914).

42971620042 is a wasteful number, since it uses less digits than its factorization.

42971620042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652754632.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 42971620042 in words is "forty-two billion, nine hundred seventy-one million, six hundred twenty thousand, forty-two".