1308821755664 has 40 divisors (see below), whose sum is σ = 2613755670240. Its totient is φ = 634526339328.

The previous prime is 1308821755651. The next prime is 1308821755667. The reversal of 1308821755664 is 4665571288031.

It is not an unprimeable number, because it can be changed into a prime (1308821755667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6848654 + ... + 7037165.

It is an arithmetic number, because the mean of its divisors is an integer number (65343891756).

Almost surely, 2^{1308821755664} is an apocalyptic number.

It is an amenable number.

1308821755664 is a deficient number, since it is larger than the sum of its proper divisors (1304933914576).

1308821755664 is a wasteful number, since it uses less digits than its factorization.

1308821755664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13886007 (or 13886001 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 1308821755664 in words is "one trillion, three hundred eight billion, eight hundred twenty-one million, seven hundred fifty-five thousand, six hundred sixty-four".