655340860961 has 2 divisors, whose sum is σ = 655340860962. Its totient is φ = 655340860960.

The previous prime is 655340860943. The next prime is 655340860981. The reversal of 655340860961 is 169068043556.

It is a happy number.

655340860961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440837569936 + 214503291025 = 663956^2 + 463145^2 .

It is a cyclic number.

It is not a de Polignac number, because 655340860961 - 2²² = 655336666657 is a prime.

It is not a weakly prime, because it can be changed into another prime (655340860981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327670430480 + 327670430481.

It is an arithmetic number, because the mean of its divisors is an integer number (327670430481).

Almost surely, 2^655340860961 is an apocalyptic number.

It is an amenable number.

655340860961 is a deficient number, since it is larger than the sum of its proper divisors (1).

655340860961 is an equidigital number, since it uses as much as digits as its factorization.

655340860961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 655340860961 in words is "six hundred fifty-five billion, three hundred forty million, eight hundred sixty thousand, nine hundred sixty-one".