1284660375516 has 216 divisors, whose sum is σ = 3981650168496. Its totient is φ = 361027860480.

The previous prime is 1284660375499. The next prime is 1284660375517. The reversal of 1284660375516 is 6155730664821.

It is a happy number.

1284660375516 is a `hidden beast` number, since 1 + 2 + 84 + 6 + 6 + 0 + 3 + 7 + 551 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284660375517) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2684220 + ... + 3126396.

Almost surely, 2^{1284660375516} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1284660375516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1990825084248).

1284660375516 is an abundant number, since it is smaller than the sum of its proper divisors (2696989792980).

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

1284660375516 is a wasteful number, since it uses less digits than its factorization.

1284660375516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442271 (or 442250 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 1284660375516 in words is "one trillion, two hundred eighty-four billion, six hundred sixty million, three hundred seventy-five thousand, five hundred sixteen".