1356625649 has 8 divisors (see below), whose sum is σ = 1385257800. Its totient is φ = 1328265216.

The previous prime is 1356625639. The next prime is 1356625657. The reversal of 1356625649 is 9465266531.

It can be written as a sum of positive squares in 4 ways, for example, as 728622049 + 628003600 = 26993^2 + 25060^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1356625649 - 2²⁸ = 1088190193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356625639) 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 7 ways as a sum of consecutive naturals, for example, 57824 + ... + 77825.

It is an arithmetic number, because the mean of its divisors is an integer number (173157225).

Almost surely, 2^1356625649 is an apocalyptic number.

It is an amenable number.

1356625649 is a deficient number, since it is larger than the sum of its proper divisors (28632151).

1356625649 is a wasteful number, since it uses less digits than its factorization.

1356625649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135859.

The product of its digits is 1166400, while the sum is 47.

The square root of 1356625649 is about 36832.3994466828. The cubic root of 1356625649 is about 1107.0145811301.

The spelling of 1356625649 in words is "one billion, three hundred fifty-six million, six hundred twenty-five thousand, six hundred forty-nine".