648538018078 has 8 divisors (see below), whose sum is σ = 976396721760. Its totient is φ = 323072444160.

The previous prime is 648538018039. The next prime is 648538018109. The reversal of 648538018078 is 870810835846.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598281763 + ... + 598282846.

It is an arithmetic number, because the mean of its divisors is an integer number (122049590220).

Almost surely, 2^648538018078 is an apocalyptic number.

648538018078 is a deficient number, since it is larger than the sum of its proper divisors (327858703682).

648538018078 is a wasteful number, since it uses less digits than its factorization.

648538018078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196564882.

The product of its (nonzero) digits is 10321920, while the sum is 58.

The spelling of 648538018078 in words is "six hundred forty-eight billion, five hundred thirty-eight million, eighteen thousand, seventy-eight".