42636685645 has 8 divisors (see below), whose sum is σ = 51183876960. Its totient is φ = 34096112400.

The previous prime is 42636685639. The next prime is 42636685669. The reversal of 42636685645 is 54658663624.

42636685645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42636685645 - 2⁵ = 42636685613 is a prime.

It is a super-3 number, since 3×42636685645³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1640331 + ... + 1666120.

It is an arithmetic number, because the mean of its divisors is an integer number (6397984620).

Almost surely, 2^42636685645 is an apocalyptic number.

It is an amenable number.

42636685645 is a deficient number, since it is larger than the sum of its proper divisors (8547191315).

42636685645 is a wasteful number, since it uses less digits than its factorization.

42636685645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309035.

The product of its digits is 24883200, while the sum is 55.

The spelling of 42636685645 in words is "forty-two billion, six hundred thirty-six million, six hundred eighty-five thousand, six hundred forty-five".