378428569769 has 8 divisors (see below), whose sum is σ = 382523461320. Its totient is φ = 374345006976.

The previous prime is 378428569763. The next prime is 378428569801. The reversal of 378428569769 is 967965824873.

It can be written as a sum of positive squares in 4 ways, for example, as 12597144169 + 365831425600 = 112237^2 + 604840^2 .

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 378428569769 - 2²⁰ = 378427521193 is a prime.

It is a super-2 number, since 2×378428569769² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 378428569696 and 378428569705.

It is not an unprimeable number, because it can be changed into a prime (378428569763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2765012 + ... + 2898645.

It is an arithmetic number, because the mean of its divisors is an integer number (47815432665).

Almost surely, 2^378428569769 is an apocalyptic number.

It is an amenable number.

378428569769 is a deficient number, since it is larger than the sum of its proper divisors (4094891551).

378428569769 is a wasteful number, since it uses less digits than its factorization.

378428569769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664379.

The product of its digits is 1097349120, while the sum is 74.

The spelling of 378428569769 in words is "three hundred seventy-eight billion, four hundred twenty-eight million, five hundred sixty-nine thousand, seven hundred sixty-nine".