6557249437 has 2 divisors, whose sum is σ = 6557249438. Its totient is φ = 6557249436.

The previous prime is 6557249417. The next prime is 6557249441. The reversal of 6557249437 is 7349427556.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4395557401 + 2161692036 = 66299^2 + 46494^2 .

It is a cyclic number.

It is not a de Polignac number, because 6557249437 - 2¹⁵ = 6557216669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6557249407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278624718 + 3278624719.

It is an arithmetic number, because the mean of its divisors is an integer number (3278624719).

Almost surely, 2^6557249437 is an apocalyptic number.

It is an amenable number.

6557249437 is a deficient number, since it is larger than the sum of its proper divisors (1).

6557249437 is an equidigital number, since it uses as much as digits as its factorization.

6557249437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6350400, while the sum is 52.

The square root of 6557249437 is about 80976.8450669696. The cubic root of 6557249437 is about 1871.7186518827.

The spelling of 6557249437 in words is "six billion, five hundred fifty-seven million, two hundred forty-nine thousand, four hundred thirty-seven".