1320708800561 has 8 divisors (see below), whose sum is σ = 1328322099360. Its totient is φ = 1313111249568.

The previous prime is 1320708800513. The next prime is 1320708800563. The reversal of 1320708800561 is 1650088070231.

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

It is a cyclic number.

It is not a de Polignac number, because 1320708800561 - 2¹⁸ = 1320708538417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320708800563) 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, 3768716 + ... + 4104221.

It is an arithmetic number, because the mean of its divisors is an integer number (166040262420).

Almost surely, 2^{1320708800561} is an apocalyptic number.

It is an amenable number.

1320708800561 is a deficient number, since it is larger than the sum of its proper divisors (7613298799).

1320708800561 is an equidigital number, since it uses as much as digits as its factorization.

1320708800561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7873903.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 1320708800561 in words is "one trillion, three hundred twenty billion, seven hundred eight million, eight hundred thousand, five hundred sixty-one".