245520725369 has 4 divisors (see below), whose sum is σ = 253440748800. Its totient is φ = 237600701940.

The previous prime is 245520725339. The next prime is 245520725377. The reversal of 245520725369 is 963527025542.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245520725369 is a prime.

It is a super-2 number, since 2×245520725369² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245520725339) 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, 3960011669 + ... + 3960011730.

It is an arithmetic number, because the mean of its divisors is an integer number (63360187200).

Almost surely, 2^245520725369 is an apocalyptic number.

It is an amenable number.

245520725369 is a deficient number, since it is larger than the sum of its proper divisors (7920023431).

245520725369 is an equidigital number, since it uses as much as digits as its factorization.

245520725369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7920023430.

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 245520725369 in words is "two hundred forty-five billion, five hundred twenty million, seven hundred twenty-five thousand, three hundred sixty-nine".