245640736408 has 16 divisors (see below), whose sum is σ = 468382761000. Its totient is φ = 120738666816.

The previous prime is 245640736387. The next prime is 245640736417. The reversal of 245640736408 is 804637046542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260212173 + ... + 260213116.

Almost surely, 2^245640736408 is an apocalyptic number.

It is an amenable number.

245640736408 is a deficient number, since it is larger than the sum of its proper divisors (222742024592).

245640736408 is a wasteful number, since it uses less digits than its factorization.

245640736408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520425354 (or 520425350 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 245640736408 in words is "two hundred forty-five billion, six hundred forty million, seven hundred thirty-six thousand, four hundred eight".