378989592181 has 2 divisors, whose sum is σ = 378989592182. Its totient is φ = 378989592180.

The previous prime is 378989592173. The next prime is 378989592203. The reversal of 378989592181 is 181295989873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334482939025 + 44506653156 = 578345^2 + 210966^2 .

It is a cyclic number.

It is not a de Polignac number, because 378989592181 - 2³ = 378989592173 is a prime.

It is a super-2 number, since 2×378989592181² (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 378989592181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378989592781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189494796090 + 189494796091.

It is an arithmetic number, because the mean of its divisors is an integer number (189494796091).

Almost surely, 2^378989592181 is an apocalyptic number.

It is an amenable number.

378989592181 is a deficient number, since it is larger than the sum of its proper divisors (1).

378989592181 is an equidigital number, since it uses as much as digits as its factorization.

378989592181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78382080, while the sum is 70.

The spelling of 378989592181 in words is "three hundred seventy-eight billion, nine hundred eighty-nine million, five hundred ninety-two thousand, one hundred eighty-one".