381316784365 has 8 divisors (see below), whose sum is σ = 499178335968. Its totient is φ = 277321297680.

The previous prime is 381316784297. The next prime is 381316784371. The reversal of 381316784365 is 563487613183.

It is a happy number.

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

It is not a de Polignac number, because 381316784365 - 2⁹ = 381316783853 is a prime.

It is a super-3 number, since 3×381316784365³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 6933032443 = 381316784365 / (3 + 8 + 1 + 3 + 1 + 6 + 7 + 8 + 4 + 3 + 6 + 5).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3466516167 + ... + 3466516276.

It is an arithmetic number, because the mean of its divisors is an integer number (62397291996).

Almost surely, 2^381316784365 is an apocalyptic number.

It is an amenable number.

381316784365 is a deficient number, since it is larger than the sum of its proper divisors (117861551603).

381316784365 is a wasteful number, since it uses less digits than its factorization.

381316784365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6933032459.

The product of its digits is 8709120, while the sum is 55.

The spelling of 381316784365 in words is "three hundred eighty-one billion, three hundred sixteen million, seven hundred eighty-four thousand, three hundred sixty-five".