645135830472 has 64 divisors (see below), whose sum is σ = 1843999672320. Its totient is φ = 184249078848.

The previous prime is 645135830461. The next prime is 645135830513. The reversal of 645135830472 is 274038531546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373558 + ... + 1195749.

It is an arithmetic number, because the mean of its divisors is an integer number (28812494880).

Almost surely, 2^645135830472 is an apocalyptic number.

It is an amenable number.

645135830472 is an abundant number, since it is smaller than the sum of its proper divisors (1198863841848).

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

645135830472 is a wasteful number, since it uses less digits than its factorization.

645135830472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571770 (or 1571766 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

It can be divided in two parts, 64513 and 5830472, that added together give a palindrome (5894985).

The spelling of 645135830472 in words is "six hundred forty-five billion, one hundred thirty-five million, eight hundred thirty thousand, four hundred seventy-two".