3864446057261 has 2 divisors, whose sum is σ = 3864446057262. Its totient is φ = 3864446057260.

The previous prime is 3864446057257. The next prime is 3864446057273. The reversal of 3864446057261 is 1627506444683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2734455797161 + 1129990260100 = 1653619^2 + 1063010^2 .

It is a cyclic number.

It is not a de Polignac number, because 3864446057261 - 2² = 3864446057257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3864446057197 and 3864446057206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3864446057201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932223028630 + 1932223028631.

It is an arithmetic number, because the mean of its divisors is an integer number (1932223028631).

Almost surely, 2^{3864446057261} is an apocalyptic number.

It is an amenable number.

3864446057261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3864446057261 is an equidigital number, since it uses as much as digits as its factorization.

3864446057261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23224320, while the sum is 56.

The spelling of 3864446057261 in words is "three trillion, eight hundred sixty-four billion, four hundred forty-six million, fifty-seven thousand, two hundred sixty-one".