642674421288 has 32 divisors (see below), whose sum is σ = 1785206726400. Its totient is φ = 214224807024.

The previous prime is 642674421271. The next prime is 642674421307. The reversal of 642674421288 is 882124476246.

It is a happy number.

642674421288 is a `hidden beast` number, since 64 + 2 + 67 + 442 + 1 + 2 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 7 ways as a sum of consecutive naturals, for example, 1487672056 + ... + 1487672487.

It is an arithmetic number, because the mean of its divisors is an integer number (55787710200).

Almost surely, 2^642674421288 is an apocalyptic number.

It is an amenable number.

642674421288 is an abundant number, since it is smaller than the sum of its proper divisors (1142532305112).

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

642674421288 is a wasteful number, since it uses less digits than its factorization.

642674421288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975344558 (or 2975344548 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 54.

The spelling of 642674421288 in words is "six hundred forty-two billion, six hundred seventy-four million, four hundred twenty-one thousand, two hundred eighty-eight".