642474060344 has 8 divisors (see below), whose sum is σ = 1204638863160. Its totient is φ = 321237030168.

The previous prime is 642474060287. The next prime is 642474060383. The reversal of 642474060344 is 443060474246.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 642474060295 and 642474060304.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 40154628764 + ... + 40154628779.

It is an arithmetic number, because the mean of its divisors is an integer number (150579857895).

Almost surely, 2^642474060344 is an apocalyptic number.

It is an amenable number.

642474060344 is a deficient number, since it is larger than the sum of its proper divisors (562164802816).

642474060344 is a wasteful number, since it uses less digits than its factorization.

642474060344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80309257549 (or 80309257545 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 44.

The spelling of 642474060344 in words is "six hundred forty-two billion, four hundred seventy-four million, sixty thousand, three hundred forty-four".