3681261071 has 4 divisors (see below), whose sum is σ = 3681817944. Its totient is φ = 3680704200.

The previous prime is 3681261053. The next prime is 3681261119. The reversal of 3681261071 is 1701621863.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3681261071 - 2²⁶ = 3614152207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681261011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268400 + ... + 281781.

It is an arithmetic number, because the mean of its divisors is an integer number (920454486).

Almost surely, 2^3681261071 is an apocalyptic number.

3681261071 is a deficient number, since it is larger than the sum of its proper divisors (556873).

3681261071 is an equidigital number, since it uses as much as digits as its factorization.

3681261071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556872.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 3681261071 is about 60673.3967320110. The cubic root of 3681261071 is about 1544.0648601743.

The spelling of 3681261071 in words is "three billion, six hundred eighty-one million, two hundred sixty-one thousand, seventy-one".