42147609847 has 8 divisors (see below), whose sum is σ = 49151732000. Its totient is φ = 36126522432.

The previous prime is 42147609841. The next prime is 42147609851. The reversal of 42147609847 is 74890674124.

It is a de Polignac number, because none of the positive numbers 2^k-42147609847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42147609794 and 42147609803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42147609841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61439322 + ... + 61440007.

It is an arithmetic number, because the mean of its divisors is an integer number (6143966500).

Almost surely, 2^42147609847 is an apocalyptic number.

42147609847 is a deficient number, since it is larger than the sum of its proper divisors (7004122153).

42147609847 is an equidigital number, since it uses as much as digits as its factorization.

42147609847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122879350 (or 122879336 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 42147609847 in words is "forty-two billion, one hundred forty-seven million, six hundred nine thousand, eight hundred forty-seven".