3936885761 has 4 divisors (see below), whose sum is σ = 3971725572. Its totient is φ = 3902045952.

The previous prime is 3936885707. The next prime is 3936885773. The reversal of 3936885761 is 1675886393.

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

It can be written as a sum of positive squares in 2 ways, for example, as 952339600 + 2984546161 = 30860^2 + 54631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3936885761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3936885697 and 3936885706.

It is not an unprimeable number, because it can be changed into a prime (3936885791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17419736 + ... + 17419961.

It is an arithmetic number, because the mean of its divisors is an integer number (992931393).

Almost surely, 2^3936885761 is an apocalyptic number.

It is an amenable number.

3936885761 is a deficient number, since it is larger than the sum of its proper divisors (34839811).

3936885761 is a wasteful number, since it uses less digits than its factorization.

3936885761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34839810.

The product of its digits is 6531840, while the sum is 56.

The square root of 3936885761 is about 62744.6074256585. The cubic root of 3936885761 is about 1579.0077839397.

The spelling of 3936885761 in words is "three billion, nine hundred thirty-six million, eight hundred eighty-five thousand, seven hundred sixty-one".