381567842369 has 4 divisors (see below), whose sum is σ = 436077534144. Its totient is φ = 327058150596.

The previous prime is 381567842339. The next prime is 381567842459. The reversal of 381567842369 is 963248765183.

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, and also an emirpimes, since its reverse is a distinct semiprime: 963248765183 = 25523 ⋅37740421.

It is a cyclic number.

It is not a de Polignac number, because 381567842369 - 2¹⁶ = 381567776833 is a prime.

It is a super-2 number, since 2×381567842369² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (381567842339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27254845877 + ... + 27254845890.

It is an arithmetic number, because the mean of its divisors is an integer number (109019383536).

Almost surely, 2^381567842369 is an apocalyptic number.

It is an amenable number.

381567842369 is a deficient number, since it is larger than the sum of its proper divisors (54509691775).

381567842369 is an equidigital number, since it uses as much as digits as its factorization.

381567842369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54509691774.

The product of its digits is 52254720, while the sum is 62.

The spelling of 381567842369 in words is "three hundred eighty-one billion, five hundred sixty-seven million, eight hundred forty-two thousand, three hundred sixty-nine".