122636538025 has 9 divisors (see below), whose sum is σ = 152071478391. Its totient is φ = 98107829640.

The previous prime is 122636538001. The next prime is 122636538047. The reversal of 122636538025 is 520835636221.

The square root of 122636538025 is 350195.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 44149153689 + 78487384336 = 210117^2 + 280156^2 .

It is not a de Polignac number, because 122636538025 - 2¹⁷ = 122636406953 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 (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1715956 + ... + 1785994.

Almost surely, 2^122636538025 is an apocalyptic number.

122636538025 is the 350195-th square number.

122636538025 is the 175098-th centered octagonal number.

It is an amenable number.

122636538025 is a deficient number, since it is larger than the sum of its proper divisors (29434940366).

122636538025 is an frugal number, since it uses more digits than its factorization.

122636538025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140088 (or 70044 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 122636538025 in words is "one hundred twenty-two billion, six hundred thirty-six million, five hundred thirty-eight thousand, twenty-five".