381055034861 has 2 divisors, whose sum is σ = 381055034862. Its totient is φ = 381055034860.

The previous prime is 381055034839. The next prime is 381055034863. The reversal of 381055034861 is 168430550183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380573012836 + 482022025 = 616906^2 + 21955^2 .

It is a cyclic number.

It is not a de Polignac number, because 381055034861 - 2³⁴ = 363875165677 is a prime.

Together with 381055034863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381055034863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190527517430 + 190527517431.

It is an arithmetic number, because the mean of its divisors is an integer number (190527517431).

Almost surely, 2^381055034861 is an apocalyptic number.

It is an amenable number.

381055034861 is a deficient number, since it is larger than the sum of its proper divisors (1).

381055034861 is an equidigital number, since it uses as much as digits as its factorization.

381055034861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 381055034861 in words is "three hundred eighty-one billion, fifty-five million, thirty-four thousand, eight hundred sixty-one".