6505780097 has 2 divisors, whose sum is σ = 6505780098. Its totient is φ = 6505780096.

The previous prime is 6505780087. The next prime is 6505780103. The reversal of 6505780097 is 7900875056.

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., 3351946816 + 3153833281 = 57896^2 + 56159^2 .

It is a cyclic number.

It is not a de Polignac number, because 6505780097 - 2¹⁰ = 6505779073 is a prime.

It is not a weakly prime, because it can be changed into another prime (6505780027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3252890048 + 3252890049.

It is an arithmetic number, because the mean of its divisors is an integer number (3252890049).

Almost surely, 2^6505780097 is an apocalyptic number.

It is an amenable number.

6505780097 is a deficient number, since it is larger than the sum of its proper divisors (1).

6505780097 is an equidigital number, since it uses as much as digits as its factorization.

6505780097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 6505780097 is about 80658.4161572740. The cubic root of 6505780097 is about 1866.8086010946.

The spelling of 6505780097 in words is "six billion, five hundred five million, seven hundred eighty thousand, ninety-seven".