245566453561 has 16 divisors (see below), whose sum is σ = 289539206208. Its totient is φ = 205325784000.

The previous prime is 245566453511. The next prime is 245566453597. The reversal of 245566453561 is 165354665542.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245566453561 is a prime.

It is a super-2 number, since 2×245566453561² (a number of 24 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 = 245566453499 and 245566453508.

It is not an unprimeable number, because it can be changed into a prime (245566453501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3060115 + ... + 3139336.

It is an arithmetic number, because the mean of its divisors is an integer number (18096200388).

Almost surely, 2^245566453561 is an apocalyptic number.

It is an amenable number.

245566453561 is a deficient number, since it is larger than the sum of its proper divisors (43972752647).

245566453561 is a wasteful number, since it uses less digits than its factorization.

245566453561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199752.

The product of its digits is 12960000, while the sum is 52.

The spelling of 245566453561 in words is "two hundred forty-five billion, five hundred sixty-six million, four hundred fifty-three thousand, five hundred sixty-one".