654017245561 has 2 divisors, whose sum is σ = 654017245562. Its totient is φ = 654017245560.

The previous prime is 654017245559. The next prime is 654017245603. The reversal of 654017245561 is 165542710456.

654017245561 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., 636293382400 + 17723863161 = 797680^2 + 133131^2 .

It is a cyclic number.

It is not a de Polignac number, because 654017245561 - 2¹ = 654017245559 is a prime.

Together with 654017245559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (654017245261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327008622780 + 327008622781.

It is an arithmetic number, because the mean of its divisors is an integer number (327008622781).

Almost surely, 2^654017245561 is an apocalyptic number.

It is an amenable number.

654017245561 is a deficient number, since it is larger than the sum of its proper divisors (1).

654017245561 is an equidigital number, since it uses as much as digits as its factorization.

654017245561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008000, while the sum is 46.

The spelling of 654017245561 in words is "six hundred fifty-four billion, seventeen million, two hundred forty-five thousand, five hundred sixty-one".