380442646861 has 2 divisors, whose sum is σ = 380442646862. Its totient is φ = 380442646860.

The previous prime is 380442646849. The next prime is 380442646891. The reversal of 380442646861 is 168646244083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367902902500 + 12539744361 = 606550^2 + 111981^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-380442646861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 380442646799 and 380442646808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380442646891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190221323430 + 190221323431.

It is an arithmetic number, because the mean of its divisors is an integer number (190221323431).

Almost surely, 2^380442646861 is an apocalyptic number.

It is an amenable number.

380442646861 is a deficient number, since it is larger than the sum of its proper divisors (1).

380442646861 is an equidigital number, since it uses as much as digits as its factorization.

380442646861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5308416, while the sum is 52.

The spelling of 380442646861 in words is "three hundred eighty billion, four hundred forty-two million, six hundred forty-six thousand, eight hundred sixty-one".