645421162032 has 30 divisors (see below), whose sum is σ = 1806282835812. Its totient is φ = 215140387296.

The previous prime is 645421162027. The next prime is 645421162051. The reversal of 645421162032 is 230261124546.

645421162032 is a `hidden beast` number, since 6 + 4 + 5 + 4 + 21 + 1 + 620 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2241045558 + ... + 2241045845.

Almost surely, 2^645421162032 is an apocalyptic number.

It is an amenable number.

645421162032 is an abundant number, since it is smaller than the sum of its proper divisors (1160861673780).

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

645421162032 is a wasteful number, since it uses less digits than its factorization.

645421162032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482091417 (or 4482091408 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 645421162032 its reverse (230261124546), we get a palindrome (875682286578).

The spelling of 645421162032 in words is "six hundred forty-five billion, four hundred twenty-one million, one hundred sixty-two thousand, thirty-two".