1320730804551 has 8 divisors (see below), whose sum is σ = 1761435047680. Its totient is φ = 880256882232.

The previous prime is 1320730804543. The next prime is 1320730804553. The reversal of 1320730804551 is 1554080370231.

It is a happy number.

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

It is not a de Polignac number, because 1320730804551 - 2³ = 1320730804543 is a prime.

It is a Duffinian number.

It is a congruent 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, 57566821 + ... + 57589758.

It is an arithmetic number, because the mean of its divisors is an integer number (220179380960).

Almost surely, 2^{1320730804551} is an apocalyptic number.

1320730804551 is a deficient number, since it is larger than the sum of its proper divisors (440704243129).

1320730804551 is a wasteful number, since it uses less digits than its factorization.

1320730804551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115160405.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 1320730804551 in words is "one trillion, three hundred twenty billion, seven hundred thirty million, eight hundred four thousand, five hundred fifty-one".