245005646 has 24 divisors (see below), whose sum is σ = 394298424. Its totient is φ = 114132240.

The previous prime is 245005643. The next prime is 245005723. The reversal of 245005646 is 646500542.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245005643) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 41261 + ... + 46823.

It is an arithmetic number, because the mean of its divisors is an integer number (16429101).

Almost surely, 2^245005646 is an apocalyptic number.

245005646 is a deficient number, since it is larger than the sum of its proper divisors (149292778).

245005646 is a wasteful number, since it uses less digits than its factorization.

245005646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664 (or 5645 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 245005646 is about 15652.6561963138. The cubic root of 245005646 is about 625.7372811777.

The spelling of 245005646 in words is "two hundred forty-five million, five thousand, six hundred forty-six".