384157443721 has 4 divisors (see below), whose sum is σ = 384165327744. Its totient is φ = 384149559700.

The previous prime is 384157443701. The next prime is 384157443727. The reversal of 384157443721 is 127344751483.

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 384157443721 - 2⁹ = 384157443209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384157443727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3868465 + ... + 3966526.

It is an arithmetic number, because the mean of its divisors is an integer number (96041331936).

Almost surely, 2^384157443721 is an apocalyptic number.

It is an amenable number.

384157443721 is a deficient number, since it is larger than the sum of its proper divisors (7884023).

384157443721 is an equidigital number, since it uses as much as digits as its factorization.

384157443721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7884022.

The product of its digits is 2257920, while the sum is 49.

The spelling of 384157443721 in words is "three hundred eighty-four billion, one hundred fifty-seven million, four hundred forty-three thousand, seven hundred twenty-one".