245645136 has 100 divisors (see below), whose sum is σ = 775646784. Its totient is φ = 74433600.

The previous prime is 245645131. The next prime is 245645137. The reversal of 245645136 is 631546542.

245645136 is a `hidden beast` number, since 2 + 4 + 5 + 645 + 1 + 3 + 6 = 666.

245645136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 245645136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245645131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5641 + ... + 22871.

Almost surely, 2^245645136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245645136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387823392).

245645136 is an abundant number, since it is smaller than the sum of its proper divisors (530001648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245645136 is a wasteful number, since it uses less digits than its factorization.

245645136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17262 (or 17247 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 245645136 is about 15673.0704075494. The cubic root of 245645136 is about 626.2812211478.

The spelling of 245645136 in words is "two hundred forty-five million, six hundred forty-five thousand, one hundred thirty-six".