381840856417 has 8 divisors (see below), whose sum is σ = 382317384680. Its totient is φ = 381364536960.

The previous prime is 381840856409. The next prime is 381840856421. The reversal of 381840856417 is 714658048183.

It can be written as a sum of positive squares in 4 ways, for example, as 117977823441 + 263863032976 = 343479^2 + 513676^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 381840856417 - 2³ = 381840856409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381840851417) 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, 3781567 + ... + 3881227.

It is an arithmetic number, because the mean of its divisors is an integer number (47789673085).

Almost surely, 2^381840856417 is an apocalyptic number.

It is an amenable number.

381840856417 is a deficient number, since it is larger than the sum of its proper divisors (476528263).

381840856417 is a wasteful number, since it uses less digits than its factorization.

381840856417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104403.

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 381840856417 in words is "three hundred eighty-one billion, eight hundred forty million, eight hundred fifty-six thousand, four hundred seventeen".