1297988549555 has 8 divisors (see below), whose sum is σ = 1557651321792. Its totient is φ = 1038347464768.

The previous prime is 1297988549537. The next prime is 1297988549603. The reversal of 1297988549555 is 5559458897921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297988549555 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 5289899 + ... + 5529828.

It is an arithmetic number, because the mean of its divisors is an integer number (194706415224).

Almost surely, 2^{1297988549555} is an apocalyptic number.

1297988549555 is a deficient number, since it is larger than the sum of its proper divisors (259662772237).

1297988549555 is a wasteful number, since it uses less digits than its factorization.

1297988549555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10843725.

The product of its digits is 1632960000, while the sum is 77.

The spelling of 1297988549555 in words is "one trillion, two hundred ninety-seven billion, nine hundred eighty-eight million, five hundred forty-nine thousand, five hundred fifty-five".