245242120055 has 4 divisors (see below), whose sum is σ = 294290544072. Its totient is φ = 196193696040.

The previous prime is 245242120049. The next prime is 245242120073. The reversal of 245242120055 is 550021242542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550021242542 = 2 ⋅275010621271.

It is not a de Polignac number, because 245242120055 - 2¹⁸ = 245241857911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24524212001 + ... + 24524212010.

It is an arithmetic number, because the mean of its divisors is an integer number (73572636018).

Almost surely, 2^245242120055 is an apocalyptic number.

245242120055 is a deficient number, since it is larger than the sum of its proper divisors (49048424017).

245242120055 is an equidigital number, since it uses as much as digits as its factorization.

245242120055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49048424016.

The product of its (nonzero) digits is 32000, while the sum is 32.

Adding to 245242120055 its reverse (550021242542), we get a palindrome (795263362597).

The spelling of 245242120055 in words is "two hundred forty-five billion, two hundred forty-two million, one hundred twenty thousand, fifty-five".