382561213861 has 2 divisors, whose sum is σ = 382561213862. Its totient is φ = 382561213860.

The previous prime is 382561213823. The next prime is 382561213871. The reversal of 382561213861 is 168312165283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 289907941761 + 92653272100 = 538431^2 + 304390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-382561213861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (382561213871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 191280606930 + 191280606931.

It is an arithmetic number, because the mean of its divisors is an integer number (191280606931).

Almost surely, 2^382561213861 is an apocalyptic number.

It is an amenable number.

382561213861 is a deficient number, since it is larger than the sum of its proper divisors (1).

382561213861 is an equidigital number, since it uses as much as digits as its factorization.

382561213861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 46.

The spelling of 382561213861 in words is "three hundred eighty-two billion, five hundred sixty-one million, two hundred thirteen thousand, eight hundred sixty-one".