612564217697 has 2 divisors, whose sum is σ = 612564217698. Its totient is φ = 612564217696.

The previous prime is 612564217663. The next prime is 612564217747. The reversal of 612564217697 is 796712465216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 536960666176 + 75603551521 = 732776^2 + 274961^2 .

It is a cyclic number.

It is not a de Polignac number, because 612564217697 - 2⁶ = 612564217633 is a prime.

It is not a weakly prime, because it can be changed into another prime (612564210697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306282108848 + 306282108849.

It is an arithmetic number, because the mean of its divisors is an integer number (306282108849).

Almost surely, 2^612564217697 is an apocalyptic number.

It is an amenable number.

612564217697 is a deficient number, since it is larger than the sum of its proper divisors (1).

612564217697 is an equidigital number, since it uses as much as digits as its factorization.

612564217697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 56.

The spelling of 612564217697 in words is "six hundred twelve billion, five hundred sixty-four million, two hundred seventeen thousand, six hundred ninety-seven".