123000755561 has 8 divisors (see below), whose sum is σ = 125382278880. Its totient is φ = 120638058912.

The previous prime is 123000755557. The next prime is 123000755587. The reversal of 123000755561 is 165557000321.

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 123000755561 - 2² = 123000755557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123000751561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4693475 + ... + 4719608.

It is an arithmetic number, because the mean of its divisors is an integer number (15672784860).

Almost surely, 2^123000755561 is an apocalyptic number.

It is an amenable number.

123000755561 is a deficient number, since it is larger than the sum of its proper divisors (2381523319).

123000755561 is an equidigital number, since it uses as much as digits as its factorization.

123000755561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9413335.

The product of its (nonzero) digits is 31500, while the sum is 35.

Adding to 123000755561 its reverse (165557000321), we get a palindrome (288557755882).

The spelling of 123000755561 in words is "one hundred twenty-three billion, seven hundred fifty-five thousand, five hundred sixty-one".