378475378817 has 16 divisors (see below), whose sum is σ = 386195314752. Its totient is φ = 370819891200.

The previous prime is 378475378793. The next prime is 378475378847. The reversal of 378475378817 is 718873574873.

It is a cyclic number.

It is not a de Polignac number, because 378475378817 - 2⁶ = 378475378753 is a prime.

It is a super-2 number, since 2×378475378817² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378475378847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14770817 + ... + 14796417.

It is an arithmetic number, because the mean of its divisors is an integer number (24137207172).

Almost surely, 2^378475378817 is an apocalyptic number.

It is an amenable number.

378475378817 is a deficient number, since it is larger than the sum of its proper divisors (7719935935).

378475378817 is a wasteful number, since it uses less digits than its factorization.

378475378817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26848.

The product of its digits is 221276160, while the sum is 68.

The spelling of 378475378817 in words is "three hundred seventy-eight billion, four hundred seventy-five million, three hundred seventy-eight thousand, eight hundred seventeen".