64511016617 has 2 divisors, whose sum is σ = 64511016618. Its totient is φ = 64511016616.

The previous prime is 64511016539. The next prime is 64511016631. The reversal of 64511016617 is 71661011546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55536106921 + 8974909696 = 235661^2 + 94736^2 .

It is a cyclic number.

It is not a de Polignac number, because 64511016617 - 2¹⁶ = 64510951081 is a prime.

It is not a weakly prime, because it can be changed into another prime (64511016677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32255508308 + 32255508309.

It is an arithmetic number, because the mean of its divisors is an integer number (32255508309).

Almost surely, 2^64511016617 is an apocalyptic number.

It is an amenable number.

64511016617 is a deficient number, since it is larger than the sum of its proper divisors (1).

64511016617 is an equidigital number, since it uses as much as digits as its factorization.

64511016617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 64511016617 in words is "sixty-four billion, five hundred eleven million, sixteen thousand, six hundred seventeen".