645611353332 has 48 divisors (see below), whose sum is σ = 1645780695552. Its totient is φ = 195353334880.

The previous prime is 645611353313. The next prime is 645611353337. The reversal of 645611353332 is 233353116546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645611353337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3490368 + ... + 3670679.

It is an arithmetic number, because the mean of its divisors is an integer number (34287097824).

Almost surely, 2^645611353332 is an apocalyptic number.

It is an amenable number.

645611353332 is an abundant number, since it is smaller than the sum of its proper divisors (1000169342220).

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

645611353332 is a wasteful number, since it uses less digits than its factorization.

645611353332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7161748 (or 7161746 counting only the distinct ones).

The product of its digits is 583200, while the sum is 42.

Adding to 645611353332 its reverse (233353116546), we get a palindrome (878964469878).

The spelling of 645611353332 in words is "six hundred forty-five billion, six hundred eleven million, three hundred fifty-three thousand, three hundred thirty-two".