3881627261 has 2 divisors, whose sum is σ = 3881627262. Its totient is φ = 3881627260.

The previous prime is 3881627237. The next prime is 3881627327. The reversal of 3881627261 is 1627261883.

3881627261 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3101821636 + 779805625 = 55694^2 + 27925^2 .

It is a cyclic number.

It is not a de Polignac number, because 3881627261 - 2¹⁴ = 3881610877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3881627461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1940813630 + 1940813631.

It is an arithmetic number, because the mean of its divisors is an integer number (1940813631).

Almost surely, 2^3881627261 is an apocalyptic number.

It is an amenable number.

3881627261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3881627261 is an equidigital number, since it uses as much as digits as its factorization.

3881627261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 3881627261 is about 62302.7066908012. The cubic root of 3881627261 is about 1571.5852462925.

The spelling of 3881627261 in words is "three billion, eight hundred eighty-one million, six hundred twenty-seven thousand, two hundred sixty-one".