6555938553949 has 2 divisors, whose sum is σ = 6555938553950. Its totient is φ = 6555938553948.

The previous prime is 6555938553911. The next prime is 6555938554111. The reversal of 6555938553949 is 9493558395556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6461331867225 + 94606686724 = 2541915^2 + 307582^2 .

It is a cyclic number.

It is not a de Polignac number, because 6555938553949 - 2²⁹ = 6555401683037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6555938553349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3277969276974 + 3277969276975.

It is an arithmetic number, because the mean of its divisors is an integer number (3277969276975).

Almost surely, 2^{6555938553949} is an apocalyptic number.

It is an amenable number.

6555938553949 is a deficient number, since it is larger than the sum of its proper divisors (1).

6555938553949 is an equidigital number, since it uses as much as digits as its factorization.

6555938553949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3936600000, while the sum is 76.

The spelling of 6555938553949 in words is "six trillion, five hundred fifty-five billion, nine hundred thirty-eight million, five hundred fifty-three thousand, nine hundred forty-nine".