642650254042 has 8 divisors (see below), whose sum is σ = 964042334496. Its totient is φ = 321302809212.

The previous prime is 642650254031. The next prime is 642650254049. The reversal of 642650254042 is 240452056246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 642650253986 and 642650254004.

It is not an unprimeable number, because it can be changed into a prime (642650254049) 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 3 ways as a sum of consecutive naturals, for example, 11122888 + ... + 11180515.

It is an arithmetic number, because the mean of its divisors is an integer number (120505291812).

Almost surely, 2^642650254042 is an apocalyptic number.

642650254042 is a deficient number, since it is larger than the sum of its proper divisors (321392080454).

642650254042 is a wasteful number, since it uses less digits than its factorization.

642650254042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22317812.

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 642650254042 in words is "six hundred forty-two billion, six hundred fifty million, two hundred fifty-four thousand, forty-two".