642206460044 has 12 divisors (see below), whose sum is σ = 1124949270984. Its totient is φ = 320792382624.

The previous prime is 642206460043. The next prime is 642206460067. The reversal of 642206460044 is 440064602246.

It is not an unprimeable number, because it can be changed into a prime (642206460041) 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, 77707202 + ... + 77715465.

It is an arithmetic number, because the mean of its divisors is an integer number (93745772582).

Almost surely, 2^642206460044 is an apocalyptic number.

It is an amenable number.

642206460044 is a deficient number, since it is larger than the sum of its proper divisors (482742810940).

642206460044 is a wasteful number, since it uses less digits than its factorization.

642206460044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155423704 (or 155423702 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 642206460044 in words is "six hundred forty-two billion, two hundred six million, four hundred sixty thousand, forty-four".