1218620660976 has 120 divisors (see below), whose sum is σ = 3488884130160. Its totient is φ = 396966417408.

The previous prime is 1218620660969. The next prime is 1218620660989. The reversal of 1218620660976 is 6790660268121.

1218620660976 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 6 + 20 + 6 + 609 + 7 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 614035 + ... + 1677581.

It is an arithmetic number, because the mean of its divisors is an integer number (29074034418).

Almost surely, 2^{1218620660976} is an apocalyptic number.

1218620660976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218620660976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1744442065080).

1218620660976 is an abundant number, since it is smaller than the sum of its proper divisors (2270263469184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218620660976 is a wasteful number, since it uses less digits than its factorization.

1218620660976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063743 (or 1063734 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 1218620660976 in words is "one trillion, two hundred eighteen billion, six hundred twenty million, six hundred sixty thousand, nine hundred seventy-six".