1320730804555 has 8 divisors (see below), whose sum is σ = 1589940472032. Its totient is φ = 1053208972608.

The previous prime is 1320730804553. The next prime is 1320730804567. The reversal of 1320730804555 is 5554080370231.

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 1320730804555 - 2¹ = 1320730804553 is a prime.

It is a super-4 number, since 4×1320730804555⁴ (a number of 50 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320730804553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421957159 + ... + 421960288.

It is an arithmetic number, because the mean of its divisors is an integer number (198742559004).

Almost surely, 2^{1320730804555} is an apocalyptic number.

1320730804555 is a deficient number, since it is larger than the sum of its proper divisors (269209667477).

1320730804555 is an equidigital number, since it uses as much as digits as its factorization.

1320730804555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843917765.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 1320730804555 in words is "one trillion, three hundred twenty billion, seven hundred thirty million, eight hundred four thousand, five hundred fifty-five".