642550056054 has 16 divisors (see below), whose sum is σ = 1298348568048. Its totient is φ = 211975276032.

The previous prime is 642550055977. The next prime is 642550056061. The reversal of 642550056054 is 450650055246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642550055997 and 642550056015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552018367 + ... + 552019530.

It is an arithmetic number, because the mean of its divisors is an integer number (81146785503).

Almost surely, 2^642550056054 is an apocalyptic number.

642550056054 is an abundant number, since it is smaller than the sum of its proper divisors (655798511994).

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

642550056054 is a wasteful number, since it uses less digits than its factorization.

642550056054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104037999.

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 642550056054 in words is "six hundred forty-two billion, five hundred fifty million, fifty-six thousand, fifty-four".