245560639 has 6 divisors (see below), whose sum is σ = 247765856. Its totient is φ = 243374880.

The previous prime is 245560633. The next prime is 245560657. The reversal of 245560639 is 936065542.

It is a de Polignac number, because none of the positive numbers 2^k-245560639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245560633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3154 + ... + 22384.

Almost surely, 2^245560639 is an apocalyptic number.

245560639 is a deficient number, since it is larger than the sum of its proper divisors (2205217).

245560639 is an equidigital number, since it uses as much as digits as its factorization.

245560639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19457 (or 19344 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The square root of 245560639 is about 15670.3745647639. The cubic root of 245560639 is about 626.2094035195.

The spelling of 245560639 in words is "two hundred forty-five million, five hundred sixty thousand, six hundred thirty-nine".