648755569 has 16 divisors (see below), whose sum is σ = 834932736. Its totient is φ = 489214800.

The previous prime is 648755567. The next prime is 648755579. The reversal of 648755569 is 965557846.

It is a cyclic number.

It is not a de Polignac number, because 648755569 - 2¹ = 648755567 is a prime.

It is a super-2 number, since 2×648755569² = 841767576617027522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648755567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133507 + ... + 138280.

It is an arithmetic number, because the mean of its divisors is an integer number (52183296).

Almost surely, 2^648755569 is an apocalyptic number.

It is an amenable number.

648755569 is a deficient number, since it is larger than the sum of its proper divisors (186177167).

648755569 is a wasteful number, since it uses less digits than its factorization.

648755569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271836.

The product of its digits is 9072000, while the sum is 55.

The square root of 648755569 is about 25470.6805759092. The cubic root of 648755569 is about 865.6859445924.

The spelling of 648755569 in words is "six hundred forty-eight million, seven hundred fifty-five thousand, five hundred sixty-nine".