122553561506 has 4 divisors (see below), whose sum is σ = 183830342262. Its totient is φ = 61276780752.

The previous prime is 122553561467. The next prime is 122553561523. The reversal of 122553561506 is 605165355221.

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., 120541590481 + 2011971025 = 347191^2 + 44855^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30638390375 + ... + 30638390378.

Almost surely, 2^122553561506 is an apocalyptic number.

122553561506 is a deficient number, since it is larger than the sum of its proper divisors (61276780756).

122553561506 is an equidigital number, since it uses as much as digits as its factorization.

122553561506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61276780755.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 122553561506 in words is "one hundred twenty-two billion, five hundred fifty-three million, five hundred sixty-one thousand, five hundred six".