120506205506 has 4 divisors (see below), whose sum is σ = 180759308262. Its totient is φ = 60253102752.

The previous prime is 120506205487. The next prime is 120506205517. The reversal of 120506205506 is 605502605021.

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

It can be written as a sum of positive squares in only one way, i.e., 64292166481 + 56214039025 = 253559^2 + 237095^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30126551375 + ... + 30126551378.

Almost surely, 2^120506205506 is an apocalyptic number.

120506205506 is a deficient number, since it is larger than the sum of its proper divisors (60253102756).

120506205506 is an equidigital number, since it uses as much as digits as its factorization.

120506205506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60253102755.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 120506205506 in words is "one hundred twenty billion, five hundred six million, two hundred five thousand, five hundred six".