245315426621 has 8 divisors (see below), whose sum is σ = 259755034680. Its totient is φ = 230876850688.

The previous prime is 245315426569. The next prime is 245315426623. The reversal of 245315426621 is 126624513542.

It can be written as a sum of positive squares in 4 ways, for example, as 350812900 + 244964613721 = 18730^2 + 494939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245315426621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245315426623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261185 + ... + 747561.

It is an arithmetic number, because the mean of its divisors is an integer number (32469379335).

Almost surely, 2^245315426621 is an apocalyptic number.

It is an amenable number.

245315426621 is a deficient number, since it is larger than the sum of its proper divisors (14439608059).

245315426621 is a wasteful number, since it uses less digits than its factorization.

245315426621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516063.

The product of its digits is 345600, while the sum is 41.

The spelling of 245315426621 in words is "two hundred forty-five billion, three hundred fifteen million, four hundred twenty-six thousand, six hundred twenty-one".