42536532638 has 16 divisors (see below), whose sum is σ = 64633109760. Its totient is φ = 20992335000.

The previous prime is 42536532631. The next prime is 42536532659. The reversal of 42536532638 is 83623563524.

It is a junction number, because it is equal to n+sod(n) for n = 42536532592 and 42536532601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42536532631) 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, 472253 + ... + 555063.

It is an arithmetic number, because the mean of its divisors is an integer number (4039569360).

Almost surely, 2^42536532638 is an apocalyptic number.

42536532638 is a deficient number, since it is larger than the sum of its proper divisors (22096577122).

42536532638 is a wasteful number, since it uses less digits than its factorization.

42536532638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86143.

The product of its digits is 3110400, while the sum is 47.

The spelling of 42536532638 in words is "forty-two billion, five hundred thirty-six million, five hundred thirty-two thousand, six hundred thirty-eight".