245663615 has 16 divisors (see below), whose sum is σ = 299700000. Its totient is φ = 193277952.

The previous prime is 245663603. The next prime is 245663659. The reversal of 245663615 is 516366542.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 245663615 - 2⁴ = 245663599 is a prime.

It is a super-2 number, since 2×245663615² = 120701223469736450, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 163136 + ... + 164634.

It is an arithmetic number, because the mean of its divisors is an integer number (18731250).

Almost surely, 2^245663615 is an apocalyptic number.

245663615 is a deficient number, since it is larger than the sum of its proper divisors (54036385).

245663615 is a wasteful number, since it uses less digits than its factorization.

245663615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026.

The product of its digits is 129600, while the sum is 38.

The square root of 245663615 is about 15673.6599108185. The cubic root of 245663615 is about 626.2969250485.

The spelling of 245663615 in words is "two hundred forty-five million, six hundred sixty-three thousand, six hundred fifteen".