642461031432 has 80 divisors (see below), whose sum is σ = 1963075395600. Its totient is φ = 194685158880.

The previous prime is 642461031419. The next prime is 642461031463. The reversal of 642461031432 is 234130164246.

642461031432 is a `hidden beast` number, since 6 + 4 + 2 + 4 + 610 + 3 + 1 + 4 + 32 = 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 19 ways as a sum of consecutive naturals, for example, 45058882 + ... + 45073137.

It is an arithmetic number, because the mean of its divisors is an integer number (24538442445).

Almost surely, 2^642461031432 is an apocalyptic number.

It is an amenable number.

642461031432 is an abundant number, since it is smaller than the sum of its proper divisors (1320614364168).

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

642461031432 is a wasteful number, since it uses less digits than its factorization.

642461031432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90132048 (or 90132035 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

Adding to 642461031432 its reverse (234130164246), we get a palindrome (876591195678).

The spelling of 642461031432 in words is "six hundred forty-two billion, four hundred sixty-one million, thirty-one thousand, four hundred thirty-two".