245355521241 has 4 divisors (see below), whose sum is σ = 327140694992. Its totient is φ = 163570347492.

The previous prime is 245355521239. The next prime is 245355521273. The reversal of 245355521241 is 142125553542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 245355521241 - 2¹ = 245355521239 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 245355521241.

It is not an unprimeable number, because it can be changed into a prime (245355521941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40892586871 + ... + 40892586876.

It is an arithmetic number, because the mean of its divisors is an integer number (81785173748).

Almost surely, 2^245355521241 is an apocalyptic number.

It is an amenable number.

245355521241 is a deficient number, since it is larger than the sum of its proper divisors (81785173751).

245355521241 is an equidigital number, since it uses as much as digits as its factorization.

245355521241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81785173750.

The product of its digits is 240000, while the sum is 39.

The spelling of 245355521241 in words is "two hundred forty-five billion, three hundred fifty-five million, five hundred twenty-one thousand, two hundred forty-one".