642505231046 has 24 divisors (see below), whose sum is σ = 1121347598616. Its totient is φ = 275300061120.

The previous prime is 642505231037. The next prime is 642505231051. The reversal of 642505231046 is 640132505246.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 247520 + ... + 1160291.

It is an arithmetic number, because the mean of its divisors is an integer number (46722816609).

Almost surely, 2^642505231046 is an apocalyptic number.

642505231046 is a deficient number, since it is larger than the sum of its proper divisors (478842367570).

642505231046 is a wasteful number, since it uses less digits than its factorization.

642505231046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412484 (or 1412477 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 642505231046 in words is "six hundred forty-two billion, five hundred five million, two hundred thirty-one thousand, forty-six".