381570943261 has 2 divisors, whose sum is σ = 381570943262. Its totient is φ = 381570943260.

The previous prime is 381570943151. The next prime is 381570943309. The reversal of 381570943261 is 162349075183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359364280900 + 22206662361 = 599470^2 + 149019^2 .

It is a cyclic number.

It is not a de Polignac number, because 381570943261 - 2²⁷ = 381436725533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381570943861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190785471630 + 190785471631.

It is an arithmetic number, because the mean of its divisors is an integer number (190785471631).

It is a 1-persistent number, because it is pandigital, but 2⋅381570943261 = 763141886522 is not.

Almost surely, 2^381570943261 is an apocalyptic number.

It is an amenable number.

381570943261 is a deficient number, since it is larger than the sum of its proper divisors (1).

381570943261 is an equidigital number, since it uses as much as digits as its factorization.

381570943261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 381570943261 in words is "three hundred eighty-one billion, five hundred seventy million, nine hundred forty-three thousand, two hundred sixty-one".