3656378851 has 2 divisors, whose sum is σ = 3656378852. Its totient is φ = 3656378850.

The previous prime is 3656378849. The next prime is 3656378861. The reversal of 3656378851 is 1588736563.

It is a weak prime.

It is an emirp because it is prime and its reverse (1588736563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3656378851 - 2¹ = 3656378849 is a prime.

Together with 3656378849, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3656378861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828189425 + 1828189426.

It is an arithmetic number, because the mean of its divisors is an integer number (1828189426).

Almost surely, 2^3656378851 is an apocalyptic number.

3656378851 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656378851 is an equidigital number, since it uses as much as digits as its factorization.

3656378851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 52.

The square root of 3656378851 is about 60467.9985694913. The cubic root of 3656378851 is about 1540.5781338370.

The spelling of 3656378851 in words is "three billion, six hundred fifty-six million, three hundred seventy-eight thousand, eight hundred fifty-one".