2321540155555 has 4 divisors (see below), whose sum is σ = 2785848186672. Its totient is φ = 1857232124440.

The previous prime is 2321540155553. The next prime is 2321540155589. The reversal of 2321540155555 is 5555510451232.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2321540155555 - 2¹ = 2321540155553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2321540155553) 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 3 ways as a sum of consecutive naturals, for example, 232154015551 + ... + 232154015560.

It is an arithmetic number, because the mean of its divisors is an integer number (696462046668).

Almost surely, 2^{2321540155555} is an apocalyptic number.

2321540155555 is a deficient number, since it is larger than the sum of its proper divisors (464308031117).

2321540155555 is an equidigital number, since it uses as much as digits as its factorization.

2321540155555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464308031116.

The product of its (nonzero) digits is 750000, while the sum is 43.

The spelling of 2321540155555 in words is "two trillion, three hundred twenty-one billion, five hundred forty million, one hundred fifty-five thousand, five hundred fifty-five".