648820556018 has 8 divisors (see below), whose sum is σ = 973301650560. Its totient is φ = 324386672500.

The previous prime is 648820556017. The next prime is 648820556057. The reversal of 648820556018 is 810655028846.

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

It is a super-2 number, since 2×648820556018² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (648820556017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11768378 + ... + 11823381.

It is an arithmetic number, because the mean of its divisors is an integer number (121662706320).

Almost surely, 2^648820556018 is an apocalyptic number.

648820556018 is a deficient number, since it is larger than the sum of its proper divisors (324481094542).

648820556018 is a wasteful number, since it uses less digits than its factorization.

648820556018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23605512.

The product of its (nonzero) digits is 3686400, while the sum is 53.

The spelling of 648820556018 in words is "six hundred forty-eight billion, eight hundred twenty million, five hundred fifty-six thousand, eighteen".