1321602066650 has 96 divisors (see below), whose sum is σ = 2547425811456. Its totient is φ = 509801760000.

The previous prime is 1321602066649. The next prime is 1321602066667. The reversal of 1321602066650 is 566602061231.

It is a happy number.

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 389736455 + ... + 389739845.

It is an arithmetic number, because the mean of its divisors is an integer number (26535685536).

Almost surely, 2^{1321602066650} is an apocalyptic number.

1321602066650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321602066650 is a deficient number, since it is larger than the sum of its proper divisors (1225823744806).

1321602066650 is a wasteful number, since it uses less digits than its factorization.

1321602066650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5928 (or 5923 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 1321602066650 in words is "one trillion, three hundred twenty-one billion, six hundred two million, sixty-six thousand, six hundred fifty".