1303981818645 has 24 divisors (see below), whose sum is σ = 2293283730528. Its totient is φ = 632233608160.

The previous prime is 1303981818631. The next prime is 1303981818677. The reversal of 1303981818645 is 5468181893031.

It is not a de Polignac number, because 1303981818645 - 2⁸ = 1303981818389 is a prime.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 359221827 + ... + 359225456.

It is an arithmetic number, because the mean of its divisors is an integer number (95553488772).

Almost surely, 2^{1303981818645} is an apocalyptic number.

1303981818645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1303981818645 is a deficient number, since it is larger than the sum of its proper divisors (989301911883).

1303981818645 is a wasteful number, since it uses less digits than its factorization.

1303981818645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718447313 (or 718447302 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 1303981818645 in words is "one trillion, three hundred three billion, nine hundred eighty-one million, eight hundred eighteen thousand, six hundred forty-five".