645688495235 has 8 divisors (see below), whose sum is σ = 885515650656. Its totient is φ = 442757825280.

The previous prime is 645688495229. The next prime is 645688495237. The reversal of 645688495235 is 532594886546.

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

It is not a de Polignac number, because 645688495235 - 2⁴ = 645688495219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645688495237) 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, 9224121326 + ... + 9224121395.

It is an arithmetic number, because the mean of its divisors is an integer number (110689456332).

Almost surely, 2^645688495235 is an apocalyptic number.

645688495235 is a deficient number, since it is larger than the sum of its proper divisors (239827155421).

645688495235 is a wasteful number, since it uses less digits than its factorization.

645688495235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18448242733.

The product of its digits is 248832000, while the sum is 65.

The spelling of 645688495235 in words is "six hundred forty-five billion, six hundred eighty-eight million, four hundred ninety-five thousand, two hundred thirty-five".