10557649 has 2 divisors, whose sum is σ = 10557650. Its totient is φ = 10557648.

The previous prime is 10557643. The next prime is 10557707. The reversal of 10557649 is 94675501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9809424 + 748225 = 3132^2 + 865^2 .

It is an emirp because it is prime and its reverse (94675501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10557649 - 2³ = 10557641 is a prime.

It is a super-2 number, since 2×10557649² = 222927904814402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10557641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278824 + 5278825.

It is an arithmetic number, because the mean of its divisors is an integer number (5278825).

Almost surely, 2^10557649 is an apocalyptic number.

It is an amenable number.

10557649 is a deficient number, since it is larger than the sum of its proper divisors (1).

10557649 is an equidigital number, since it uses as much as digits as its factorization.

10557649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 10557649 is about 3249.2536065995. The cubic root of 10557649 is about 219.3759796008.

It can be divided in two parts, 105576 and 49, that added together give a square (105625 = 325²).

The spelling of 10557649 in words is "ten million, five hundred fifty-seven thousand, six hundred forty-nine".