378832816865 has 16 divisors (see below), whose sum is σ = 481354986960. Its totient is φ = 285230254080.

The previous prime is 378832816771. The next prime is 378832816877. The reversal of 378832816865 is 568618238873.

It can be written as a sum of positive squares in 8 ways, for example, as 1206589696 + 377626227169 = 34736^2 + 614513^2 .

It is not a de Polignac number, because 378832816865 - 2¹² = 378832812769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5200595 + ... + 5272935.

It is an arithmetic number, because the mean of its divisors is an integer number (30084686685).

Almost surely, 2^378832816865 is an apocalyptic number.

It is an amenable number.

378832816865 is a deficient number, since it is larger than the sum of its proper divisors (102522170095).

378832816865 is a wasteful number, since it uses less digits than its factorization.

378832816865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133972.

The product of its digits is 92897280, while the sum is 65.

The spelling of 378832816865 in words is "three hundred seventy-eight billion, eight hundred thirty-two million, eight hundred sixteen thousand, eight hundred sixty-five".