3656378941 has 2 divisors, whose sum is σ = 3656378942. Its totient is φ = 3656378940.

The previous prime is 3656378939. The next prime is 3656378993. The reversal of 3656378941 is 1498736563.

It is a happy number.

3656378941 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (3656378993) can be obtained adding 3656378941 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2194922500 + 1461456441 = 46850^2 + 38229^2 .

It is a cyclic number.

It is not a de Polignac number, because 3656378941 - 2¹ = 3656378939 is a prime.

Together with 3656378939, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3656378441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828189470 + 1828189471.

It is an arithmetic number, because the mean of its divisors is an integer number (1828189471).

Almost surely, 2^3656378941 is an apocalyptic number.

It is an amenable number.

3656378941 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656378941 is an equidigital number, since it uses as much as digits as its factorization.

3656378941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 52.

The square root of 3656378941 is about 60467.9993136866. Note that the first 3 decimals coincide. The cubic root of 3656378941 is about 1540.5781464772.

The spelling of 3656378941 in words is "three billion, six hundred fifty-six million, three hundred seventy-eight thousand, nine hundred forty-one".