648620555 has 8 divisors (see below), whose sum is σ = 849103344. Its totient is φ = 471724000.

The previous prime is 648620551. The next prime is 648620563. The reversal of 648620555 is 555026846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 648620555 - 2² = 648620551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648620551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5896496 + ... + 5896605.

It is an arithmetic number, because the mean of its divisors is an integer number (106137918).

Almost surely, 2^648620555 is an apocalyptic number.

648620555 is a deficient number, since it is larger than the sum of its proper divisors (200482789).

648620555 is a wasteful number, since it uses less digits than its factorization.

648620555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11793117.

The product of its (nonzero) digits is 288000, while the sum is 41.

The square root of 648620555 is about 25468.0300573091. The cubic root of 648620555 is about 865.6258871343.

The spelling of 648620555 in words is "six hundred forty-eight million, six hundred twenty thousand, five hundred fifty-five".