42636740221 has 8 divisors (see below), whose sum is σ = 44897376320. Its totient is φ = 40377763872.

The previous prime is 42636740191. The next prime is 42636740261. The reversal of 42636740221 is 12204763624.

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

It is a cyclic number.

It is not a de Polignac number, because 42636740221 - 2⁵ = 42636740189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42636740261) 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, 362025 + ... + 465118.

It is an arithmetic number, because the mean of its divisors is an integer number (5612172040).

Almost surely, 2^42636740221 is an apocalyptic number.

It is an amenable number.

42636740221 is a deficient number, since it is larger than the sum of its proper divisors (2260636099).

42636740221 is a wasteful number, since it uses less digits than its factorization.

42636740221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829875.

The product of its (nonzero) digits is 96768, while the sum is 37.

The spelling of 42636740221 in words is "forty-two billion, six hundred thirty-six million, seven hundred forty thousand, two hundred twenty-one".