42636612342021 has 4 divisors (see below), whose sum is σ = 56848816456032. Its totient is φ = 28424408228012.

The previous prime is 42636612341957. The next prime is 42636612342151. The reversal of 42636612342021 is 12024321663624.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42636612342021 - 2⁶ = 42636612341957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42636612342521) 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 3 ways as a sum of consecutive naturals, for example, 7106102057001 + ... + 7106102057006.

It is an arithmetic number, because the mean of its divisors is an integer number (14212204114008).

Almost surely, 2^{42636612342021} is an apocalyptic number.

It is an amenable number.

42636612342021 is a deficient number, since it is larger than the sum of its proper divisors (14212204114011).

42636612342021 is a wasteful number, since it uses less digits than its factorization.

42636612342021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14212204114010.

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 42636612342021 in words is "forty-two trillion, six hundred thirty-six billion, six hundred twelve million, three hundred forty-two thousand, twenty-one".