3681256077 has 6 divisors (see below), whose sum is σ = 5317369902. Its totient is φ = 2454170712.

The previous prime is 3681256057. The next prime is 3681256079. The reversal of 3681256077 is 7706521863.

3681256077 is a `hidden beast` number, since 3 + 6 + 8 + 12 + 560 + 77 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2364001641 + 1317254436 = 48621^2 + 36294^2 .

It is not a de Polignac number, because 3681256077 - 2¹⁸ = 3680993933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681256079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204514218 + ... + 204514235.

It is an arithmetic number, because the mean of its divisors is an integer number (886228317).

Almost surely, 2^3681256077 is an apocalyptic number.

It is an amenable number.

3681256077 is a deficient number, since it is larger than the sum of its proper divisors (1636113825).

3681256077 is a wasteful number, since it uses less digits than its factorization.

3681256077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409028459 (or 409028456 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 3681256077 is about 60673.3555772219. The cubic root of 3681256077 is about 1544.0641619477.

The spelling of 3681256077 in words is "three billion, six hundred eighty-one million, two hundred fifty-six thousand, seventy-seven".