245420633665 has 8 divisors (see below), whose sum is σ = 295325110080. Its totient is φ = 195789607152.

The previous prime is 245420633657. The next prime is 245420633669. The reversal of 245420633665 is 566336024542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245420633665 - 2³ = 245420633657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245420633669) 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 7 ways as a sum of consecutive naturals, for example, 68360499 + ... + 68364088.

It is an arithmetic number, because the mean of its divisors is an integer number (36915638760).

Almost surely, 2^245420633665 is an apocalyptic number.

It is an amenable number.

245420633665 is a deficient number, since it is larger than the sum of its proper divisors (49904476415).

245420633665 is a wasteful number, since it uses less digits than its factorization.

245420633665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136724951.

The product of its (nonzero) digits is 3110400, while the sum is 46.

The spelling of 245420633665 in words is "two hundred forty-five billion, four hundred twenty million, six hundred thirty-three thousand, six hundred sixty-five".