611784250897 has 2 divisors, whose sum is σ = 611784250898. Its totient is φ = 611784250896.

The previous prime is 611784250877. The next prime is 611784250949. The reversal of 611784250897 is 798052487116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321172691841 + 290611559056 = 566721^2 + 539084^2 .

It is a cyclic number.

It is not a de Polignac number, because 611784250897 - 2²³ = 611775862289 is a prime.

It is not a weakly prime, because it can be changed into another prime (611784250817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305892125448 + 305892125449.

It is an arithmetic number, because the mean of its divisors is an integer number (305892125449).

Almost surely, 2^611784250897 is an apocalyptic number.

It is an amenable number.

611784250897 is a deficient number, since it is larger than the sum of its proper divisors (1).

611784250897 is an equidigital number, since it uses as much as digits as its factorization.

611784250897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6773760, while the sum is 58.

The spelling of 611784250897 in words is "six hundred eleven billion, seven hundred eighty-four million, two hundred fifty thousand, eight hundred ninety-seven".