3655464378649 has 2 divisors, whose sum is σ = 3655464378650. Its totient is φ = 3655464378648.

The previous prime is 3655464378539. The next prime is 3655464378679. The reversal of 3655464378649 is 9468734645563.

3655464378649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2258612225424 + 1396852153225 = 1502868^2 + 1181885^2 .

It is a cyclic number.

It is not a de Polignac number, because 3655464378649 - 2¹¹ = 3655464376601 is a prime.

It is not a weakly prime, because it can be changed into another prime (3655464378679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1827732189324 + 1827732189325.

It is an arithmetic number, because the mean of its divisors is an integer number (1827732189325).

Almost surely, 2^{3655464378649} is an apocalyptic number.

It is an amenable number.

3655464378649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3655464378649 is an equidigital number, since it uses as much as digits as its factorization.

3655464378649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1567641600, while the sum is 70.

The spelling of 3655464378649 in words is "three trillion, six hundred fifty-five billion, four hundred sixty-four million, three hundred seventy-eight thousand, six hundred forty-nine".