245768856691 has 8 divisors (see below), whose sum is σ = 249147083520. Its totient is φ = 242390941632.

The previous prime is 245768856689. The next prime is 245768856709. The reversal of 245768856691 is 196658867542.

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 245768856691 - 2¹ = 245768856689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245768856631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1827141 + ... + 1957033.

It is an arithmetic number, because the mean of its divisors is an integer number (31143385440).

Almost surely, 2^245768856691 is an apocalyptic number.

245768856691 is a deficient number, since it is larger than the sum of its proper divisors (3378226829).

245768856691 is a wasteful number, since it uses less digits than its factorization.

245768856691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155885.

The product of its digits is 174182400, while the sum is 67.

The spelling of 245768856691 in words is "two hundred forty-five billion, seven hundred sixty-eight million, eight hundred fifty-six thousand, six hundred ninety-one".