1218528100648 has 8 divisors (see below), whose sum is σ = 2284740188730. Its totient is φ = 609264050320.

The previous prime is 1218528100583. The next prime is 1218528100687. The reversal of 1218528100648 is 8460018258121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1216560468484 + 1967632164 = 1102978^2 + 44358^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1218528100598 and 1218528100607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76158006283 + ... + 76158006298.

Almost surely, 2^{1218528100648} is an apocalyptic number.

It is an amenable number.

1218528100648 is a deficient number, since it is larger than the sum of its proper divisors (1066212088082).

1218528100648 is a wasteful number, since it uses less digits than its factorization.

1218528100648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152316012587 (or 152316012583 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 46.

The spelling of 1218528100648 in words is "one trillion, two hundred eighteen billion, five hundred twenty-eight million, one hundred thousand, six hundred forty-eight".