3120643331555 has 8 divisors (see below), whose sum is σ = 3761564698752. Its totient is φ = 2485319531328.

The previous prime is 3120643331539. The next prime is 3120643331609. The reversal of 3120643331555 is 5551333460213.

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 3120643331555 - 2⁴ = 3120643331539 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, 1399390514 + ... + 1399392743.

It is an arithmetic number, because the mean of its divisors is an integer number (470195587344).

Almost surely, 2^{3120643331555} is an apocalyptic number.

3120643331555 is a deficient number, since it is larger than the sum of its proper divisors (640921367197).

3120643331555 is a wasteful number, since it uses less digits than its factorization.

3120643331555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798783485.

The product of its (nonzero) digits is 486000, while the sum is 41.

Adding to 3120643331555 its reverse (5551333460213), we get a palindrome (8671976791768).

The spelling of 3120643331555 in words is "three trillion, one hundred twenty billion, six hundred forty-three million, three hundred thirty-one thousand, five hundred fifty-five".