381431727659 has 4 divisors (see below), whose sum is σ = 385208279520. Its totient is φ = 377655175800.

The previous prime is 381431727641. The next prime is 381431727799. The reversal of 381431727659 is 956727134183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381431727659 - 2⁸ = 381431727403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381431729659) 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, 1888275779 + ... + 1888275980.

It is an arithmetic number, because the mean of its divisors is an integer number (96302069880).

Almost surely, 2^381431727659 is an apocalyptic number.

381431727659 is a deficient number, since it is larger than the sum of its proper divisors (3776551861).

381431727659 is a wasteful number, since it uses less digits than its factorization.

381431727659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776551860.

The product of its digits is 7620480, while the sum is 56.

The spelling of 381431727659 in words is "three hundred eighty-one billion, four hundred thirty-one million, seven hundred twenty-seven thousand, six hundred fifty-nine".