642650133132 has 72 divisors (see below), whose sum is σ = 1857430848000. Its totient is φ = 183526695648.

The previous prime is 642650133109. The next prime is 642650133137. The reversal of 642650133132 is 231331056246.

642650133132 is a `hidden beast` number, since 64 + 265 + 0 + 1 + 331 + 3 + 2 = 666.

It is a super-2 number, since 2×642650133132² (a number of 24 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (642650133137) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 78532 + ... + 1136427.

Almost surely, 2^642650133132 is an apocalyptic number.

It is an amenable number.

642650133132 is an abundant number, since it is smaller than the sum of its proper divisors (1214780714868).

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

642650133132 is a wasteful number, since it uses less digits than its factorization.

642650133132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217075 (or 1217070 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 642650133132 its reverse (231331056246), we get a palindrome (873981189378).

The spelling of 642650133132 in words is "six hundred forty-two billion, six hundred fifty million, one hundred thirty-three thousand, one hundred thirty-two".