648960577 has 2 divisors, whose sum is σ = 648960578. Its totient is φ = 648960576.

The previous prime is 648960569. The next prime is 648960607. The reversal of 648960577 is 775069846.

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., 462938256 + 186022321 = 21516^2 + 13639^2 .

It is a cyclic number.

It is not a de Polignac number, because 648960577 - 2³ = 648960569 is a prime.

It is a super-2 number, since 2×648960577² = 842299661000345858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (648960077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324480288 + 324480289.

It is an arithmetic number, because the mean of its divisors is an integer number (324480289).

Almost surely, 2^648960577 is an apocalyptic number.

It is an amenable number.

648960577 is a deficient number, since it is larger than the sum of its proper divisors (1).

648960577 is an equidigital number, since it uses as much as digits as its factorization.

648960577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The square root of 648960577 is about 25474.7046499071. The cubic root of 648960577 is about 865.7771211269. Note that the first 3 decimals are identical.

The spelling of 648960577 in words is "six hundred forty-eight million, nine hundred sixty thousand, five hundred seventy-seven".