1356655649 has 2 divisors, whose sum is σ = 1356655650. Its totient is φ = 1356655648.

The previous prime is 1356655639. The next prime is 1356655661. The reversal of 1356655649 is 9465566531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1058851600 + 297804049 = 32540^2 + 17257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1356655649 - 2⁸ = 1356655393 is a prime.

It is a super-3 number, since 3×1356655649³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1356655597 and 1356655606.

It is not a weakly prime, because it can be changed into another prime (1356655639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678327824 + 678327825.

It is an arithmetic number, because the mean of its divisors is an integer number (678327825).

Almost surely, 2^1356655649 is an apocalyptic number.

It is an amenable number.

1356655649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356655649 is an equidigital number, since it uses as much as digits as its factorization.

1356655649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 50.

The square root of 1356655649 is about 36832.8066945760. The cubic root of 1356655649 is about 1107.0227411293.

The spelling of 1356655649 in words is "one billion, three hundred fifty-six million, six hundred fifty-five thousand, six hundred forty-nine".