645422174536 has 16 divisors (see below), whose sum is σ = 1210187894400. Its totient is φ = 322705402704.

The previous prime is 645422174533. The next prime is 645422174597. The reversal of 645422174536 is 635471224546.

It is a self number, because there is not a number n which added to its sum of digits gives 645422174536.

It is not an unprimeable number, because it can be changed into a prime (645422174533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207040 + ... + 1154863.

It is an arithmetic number, because the mean of its divisors is an integer number (75636743400).

Almost surely, 2^645422174536 is an apocalyptic number.

It is an amenable number.

645422174536 is a deficient number, since it is larger than the sum of its proper divisors (564765719864).

645422174536 is a wasteful number, since it uses less digits than its factorization.

645422174536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421148 (or 1421144 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 49.

The spelling of 645422174536 in words is "six hundred forty-five billion, four hundred twenty-two million, one hundred seventy-four thousand, five hundred thirty-six".