381691881429 has 8 divisors (see below), whose sum is σ = 535707903840. Its totient is φ = 241068556656.

The previous prime is 381691881427. The next prime is 381691881449. The reversal of 381691881429 is 924188196183.

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

It is not a de Polignac number, because 381691881429 - 2¹ = 381691881427 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381691881427) 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, 3348174342 + ... + 3348174455.

It is an arithmetic number, because the mean of its divisors is an integer number (66963487980).

Almost surely, 2^381691881429 is an apocalyptic number.

It is an amenable number.

381691881429 is a deficient number, since it is larger than the sum of its proper divisors (154016022411).

381691881429 is a wasteful number, since it uses less digits than its factorization.

381691881429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6696348819.

The product of its digits is 5971968, while the sum is 60.

The spelling of 381691881429 in words is "three hundred eighty-one billion, six hundred ninety-one million, eight hundred eighty-one thousand, four hundred twenty-nine".