648954161617 has 2 divisors, whose sum is σ = 648954161618. Its totient is φ = 648954161616.

The previous prime is 648954161599. The next prime is 648954161663. The reversal of 648954161617 is 716161459846.

It is a happy number.

648954161617 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., 512382524481 + 136571637136 = 715809^2 + 369556^2 .

It is a cyclic number.

It is not a de Polignac number, because 648954161617 - 2¹⁹ = 648953637329 is a prime.

It is a super-2 number, since 2×648954161617² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (648954161917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324477080808 + 324477080809.

It is an arithmetic number, because the mean of its divisors is an integer number (324477080809).

Almost surely, 2^648954161617 is an apocalyptic number.

It is an amenable number.

648954161617 is a deficient number, since it is larger than the sum of its proper divisors (1).

648954161617 is an equidigital number, since it uses as much as digits as its factorization.

648954161617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 58.

The spelling of 648954161617 in words is "six hundred forty-eight billion, nine hundred fifty-four million, one hundred sixty-one thousand, six hundred seventeen".