612564217663 has 2 divisors, whose sum is σ = 612564217664. Its totient is φ = 612564217662.

The previous prime is 612564217633. The next prime is 612564217697. The reversal of 612564217663 is 366712465216.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612564217663 is a prime.

It is a super-2 number, since 2×612564217663² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612564217633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306282108831 + 306282108832.

It is an arithmetic number, because the mean of its divisors is an integer number (306282108832).

Almost surely, 2^612564217663 is an apocalyptic number.

612564217663 is a deficient number, since it is larger than the sum of its proper divisors (1).

612564217663 is an equidigital number, since it uses as much as digits as its factorization.

612564217663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 49.

The spelling of 612564217663 in words is "six hundred twelve billion, five hundred sixty-four million, two hundred seventeen thousand, six hundred sixty-three".