378929177969 has 2 divisors, whose sum is σ = 378929177970. Its totient is φ = 378929177968.

The previous prime is 378929177953. The next prime is 378929178029. The reversal of 378929177969 is 969771929873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373244017969 + 5685160000 = 610937^2 + 75400^2 .

It is a cyclic number.

It is not a de Polignac number, because 378929177969 - 2⁴ = 378929177953 is a prime.

It is a super-2 number, since 2×378929177969² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 378929177969.

It is not a weakly prime, because it can be changed into another prime (378929177269) 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 as a sum of consecutive naturals, namely, 189464588984 + 189464588985.

It is an arithmetic number, because the mean of its divisors is an integer number (189464588985).

Almost surely, 2^378929177969 is an apocalyptic number.

It is an amenable number.

378929177969 is a deficient number, since it is larger than the sum of its proper divisors (1).

378929177969 is an equidigital number, since it uses as much as digits as its factorization.

378929177969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648121824, while the sum is 77.

The spelling of 378929177969 in words is "three hundred seventy-eight billion, nine hundred twenty-nine million, one hundred seventy-seven thousand, nine hundred sixty-nine".