1286991183628 has 48 divisors (see below), whose sum is σ = 2370449844000. Its totient is φ = 610501667328.

The previous prime is 1286991183617. The next prime is 1286991183649. The reversal of 1286991183628 is 8263811996821.

It is a happy number.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1286991183628.

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 15 ways as a sum of consecutive naturals, for example, 15652288 + ... + 15734296.

It is an arithmetic number, because the mean of its divisors is an integer number (49384371750).

Almost surely, 2^{1286991183628} is an apocalyptic number.

It is an amenable number.

1286991183628 is a deficient number, since it is larger than the sum of its proper divisors (1083458660372).

1286991183628 is a wasteful number, since it uses less digits than its factorization.

1286991183628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84394 (or 84392 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 64.

The spelling of 1286991183628 in words is "one trillion, two hundred eighty-six billion, nine hundred ninety-one million, one hundred eighty-three thousand, six hundred twenty-eight".