381718839242 has 8 divisors (see below), whose sum is σ = 616622740356. Its totient is φ = 176177925792.

The previous prime is 381718839241. The next prime is 381718839247. The reversal of 381718839242 is 242938817183.

It can be written as a sum of positive squares in 2 ways, for example, as 378703621321 + 3015217921 = 615389^2 + 54911^2 .

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

It is not an unprimeable number, because it can be changed into a prime (381718839241) 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, 7340746883 + ... + 7340746934.

Almost surely, 2^381718839242 is an apocalyptic number.

381718839242 is a deficient number, since it is larger than the sum of its proper divisors (234903901114).

381718839242 is a wasteful number, since it uses less digits than its factorization.

381718839242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14681493832.

The product of its digits is 4644864, while the sum is 56.

The spelling of 381718839242 in words is "three hundred eighty-one billion, seven hundred eighteen million, eight hundred thirty-nine thousand, two hundred forty-two".