42688332621 has 12 divisors (see below), whose sum is σ = 67266463680. Its totient is φ = 25871716680.

The previous prime is 42688332587. The next prime is 42688332623. The reversal of 42688332621 is 12623388624.

It is not a de Polignac number, because 42688332621 - 2¹³ = 42688324429 is a prime.

It is a super-3 number, since 3×42688332621³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42688332623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215597541 + ... + 215597738.

It is an arithmetic number, because the mean of its divisors is an integer number (5605538640).

Almost surely, 2^42688332621 is an apocalyptic number.

It is an amenable number.

42688332621 is a deficient number, since it is larger than the sum of its proper divisors (24578131059).

42688332621 is a wasteful number, since it uses less digits than its factorization.

42688332621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431195296 (or 431195293 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The spelling of 42688332621 in words is "forty-two billion, six hundred eighty-eight million, three hundred thirty-two thousand, six hundred twenty-one".