159916667421 has 8 divisors (see below), whose sum is σ = 243682540864. Its totient is φ = 91380952800.

The previous prime is 159916667419. The next prime is 159916667431. The reversal of 159916667421 is 124766619951.

It is a happy number.

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

It is not a de Polignac number, because 159916667421 - 2¹ = 159916667419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159916667431) 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, 3807539680 + ... + 3807539721.

It is an arithmetic number, because the mean of its divisors is an integer number (30460317608).

Almost surely, 2^159916667421 is an apocalyptic number.

It is an amenable number.

159916667421 is a deficient number, since it is larger than the sum of its proper divisors (83765873443).

159916667421 is an equidigital number, since it uses as much as digits as its factorization.

159916667421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615079411.

The product of its digits is 4898880, while the sum is 57.

The spelling of 159916667421 in words is "one hundred fifty-nine billion, nine hundred sixteen million, six hundred sixty-seven thousand, four hundred twenty-one".