42531531646 has 16 divisors (see below), whose sum is σ = 64217813904. Its totient is φ = 21125712384.

The previous prime is 42531531619. The next prime is 42531531649. The reversal of 42531531646 is 64613513524.

It is a junction number, because it is equal to n+sod(n) for n = 42531531599 and 42531531608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42531531649) 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, 719070 + ... + 775966.

It is an arithmetic number, because the mean of its divisors is an integer number (4013613369).

Almost surely, 2^42531531646 is an apocalyptic number.

42531531646 is a deficient number, since it is larger than the sum of its proper divisors (21686282258).

42531531646 is a wasteful number, since it uses less digits than its factorization.

42531531646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59355.

The product of its digits is 259200, while the sum is 40.

The spelling of 42531531646 in words is "forty-two billion, five hundred thirty-one million, five hundred thirty-one thousand, six hundred forty-six".