245725645637361 has 4 divisors (see below), whose sum is σ = 327634194183152. Its totient is φ = 163817097091572.

The previous prime is 245725645637357. The next prime is 245725645637363. The reversal of 245725645637361 is 163736546527542.

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 245725645637361 - 2² = 245725645637357 is a prime.

It is a super-2 number, since 2×245725645637361² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245725645637292 and 245725645637301.

It is not an unprimeable number, because it can be changed into a prime (245725645637363) 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, 40954274272891 + ... + 40954274272896.

It is an arithmetic number, because the mean of its divisors is an integer number (81908548545788).

Almost surely, 2^{245725645637361} is an apocalyptic number.

It is an amenable number.

245725645637361 is a deficient number, since it is larger than the sum of its proper divisors (81908548545791).

245725645637361 is an equidigital number, since it uses as much as digits as its factorization.

245725645637361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81908548545790.

The product of its digits is 762048000, while the sum is 66.

The spelling of 245725645637361 in words is "two hundred forty-five trillion, seven hundred twenty-five billion, six hundred forty-five million, six hundred thirty-seven thousand, three hundred sixty-one".