645283422834 has 32 divisors (see below), whose sum is σ = 1366523136000. Its totient is φ = 202435844352.

The previous prime is 645283422827. The next prime is 645283422841. The reversal of 645283422834 is 438224382546.

It is an interprime number because it is at equal distance from previous prime (645283422827) and next prime (645283422841).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4409167 + ... + 4553165.

It is an arithmetic number, because the mean of its divisors is an integer number (42703848000).

Almost surely, 2^645283422834 is an apocalyptic number.

645283422834 is an abundant number, since it is smaller than the sum of its proper divisors (721239713166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645283422834 is a wasteful number, since it uses less digits than its factorization.

645283422834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187954.

The product of its digits is 8847360, while the sum is 51.

The spelling of 645283422834 in words is "six hundred forty-five billion, two hundred eighty-three million, four hundred twenty-two thousand, eight hundred thirty-four".