42437664421 has 8 divisors (see below), whose sum is σ = 42581444864. Its totient is φ = 42294037680.

The previous prime is 42437664413. The next prime is 42437664433. The reversal of 42437664421 is 12446673424.

It is a happy number.

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 42437664421 - 2³ = 42437664413 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 (42437664461) 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, 528811 + ... + 603751.

It is an arithmetic number, because the mean of its divisors is an integer number (5322680608).

Almost surely, 2^42437664421 is an apocalyptic number.

It is an amenable number.

42437664421 is a deficient number, since it is larger than the sum of its proper divisors (143780443).

42437664421 is a wasteful number, since it uses less digits than its factorization.

42437664421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76851.

The product of its digits is 774144, while the sum is 43.

The spelling of 42437664421 in words is "forty-two billion, four hundred thirty-seven million, six hundred sixty-four thousand, four hundred twenty-one".