245285679491 has 16 divisors (see below), whose sum is σ = 254729499840. Its totient is φ = 235909376640.

The previous prime is 245285679487. The next prime is 245285679521. The reversal of 245285679491 is 194976582542.

It is a cyclic number.

It is not a de Polignac number, because 245285679491 - 2² = 245285679487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245285679791) 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 15 ways as a sum of consecutive naturals, for example, 7850921 + ... + 7882101.

It is an arithmetic number, because the mean of its divisors is an integer number (15920593740).

Almost surely, 2^245285679491 is an apocalyptic number.

245285679491 is a deficient number, since it is larger than the sum of its proper divisors (9443820349).

245285679491 is a wasteful number, since it uses less digits than its factorization.

245285679491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32254.

The product of its digits is 43545600, while the sum is 62.

The spelling of 245285679491 in words is "two hundred forty-five billion, two hundred eighty-five million, six hundred seventy-nine thousand, four hundred ninety-one".