245542414021 has 32 divisors (see below), whose sum is σ = 266375783520. Its totient is φ = 225507803136.

The previous prime is 245542414009. The next prime is 245542414067. The reversal of 245542414021 is 120414245542.

It can be written as a sum of positive squares in 16 ways, for example, as 2069249121 + 243473164900 = 45489^2 + 493430^2 .

It is a cyclic number.

It is not a de Polignac number, because 245542414021 - 2⁹ = 245542413509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245542415021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36705045 + ... + 36711733.

It is an arithmetic number, because the mean of its divisors is an integer number (8324243235).

Almost surely, 2^245542414021 is an apocalyptic number.

It is an amenable number.

245542414021 is a deficient number, since it is larger than the sum of its proper divisors (20833369499).

245542414021 is a wasteful number, since it uses less digits than its factorization.

245542414021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7113.

The product of its (nonzero) digits is 51200, while the sum is 34.

Adding to 245542414021 its reverse (120414245542), we get a palindrome (365956659563).

The spelling of 245542414021 in words is "two hundred forty-five billion, five hundred forty-two million, four hundred fourteen thousand, twenty-one".