245661688 has 16 divisors (see below), whose sum is σ = 464244480. Its totient is φ = 121863168.

The previous prime is 245661683. The next prime is 245661733. The reversal of 245661688 is 886166542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245661683) 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, 119881 + ... + 121912.

It is an arithmetic number, because the mean of its divisors is an integer number (29015280).

Almost surely, 2^245661688 is an apocalyptic number.

It is an amenable number.

245661688 is a deficient number, since it is larger than the sum of its proper divisors (218582792).

245661688 is a wasteful number, since it uses less digits than its factorization.

245661688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241926 (or 241922 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The square root of 245661688 is about 15673.5984381379. The cubic root of 245661688 is about 626.2952874741.

The spelling of 245661688 in words is "two hundred forty-five million, six hundred sixty-one thousand, six hundred eighty-eight".