6355540665973 has 2 divisors, whose sum is σ = 6355540665974. Its totient is φ = 6355540665972.

The previous prime is 6355540665967. The next prime is 6355540666043. The reversal of 6355540665973 is 3795660455536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5642895728484 + 712644937489 = 2375478^2 + 844183^2 .

It is a cyclic number.

It is not a de Polignac number, because 6355540665973 - 2⁴¹ = 4156517410421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6355540665473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3177770332986 + 3177770332987.

It is an arithmetic number, because the mean of its divisors is an integer number (3177770332987).

Almost surely, 2^{6355540665973} is an apocalyptic number.

It is an amenable number.

6355540665973 is a deficient number, since it is larger than the sum of its proper divisors (1).

6355540665973 is an equidigital number, since it uses as much as digits as its factorization.

6355540665973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180000, while the sum is 64.

The spelling of 6355540665973 in words is "six trillion, three hundred fifty-five billion, five hundred forty million, six hundred sixty-five thousand, nine hundred seventy-three".