245342561517 has 24 divisors (see below), whose sum is σ = 363992259384. Its totient is φ = 159127732224.

The previous prime is 245342561473. The next prime is 245342561531. The reversal of 245342561517 is 715165243542.

245342561517 is a `hidden beast` number, since 2 + 4 + 5 + 3 + 4 + 25 + 615 + 1 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5261181156 + 240081380361 = 72534^2 + 489981^2 .

It is not a de Polignac number, because 245342561517 - 2²⁸ = 245074126061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245342561537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5316013 + ... + 5361965.

It is an arithmetic number, because the mean of its divisors is an integer number (15166344141).

Almost surely, 2^245342561517 is an apocalyptic number.

It is an amenable number.

245342561517 is a deficient number, since it is larger than the sum of its proper divisors (118649697867).

245342561517 is a wasteful number, since it uses less digits than its factorization.

245342561517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62029 (or 62026 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 245342561517 in words is "two hundred forty-five billion, three hundred forty-two million, five hundred sixty-one thousand, five hundred seventeen".