642567470744 has 16 divisors (see below), whose sum is σ = 1205514099720. Its totient is φ = 321097044160.

The previous prime is 642567470717. The next prime is 642567470749. The reversal of 642567470744 is 447074765246.

It is a self number, because there is not a number n which added to its sum of digits gives 642567470744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642567470749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23321774 + ... + 23349309.

Almost surely, 2^642567470744 is an apocalyptic number.

It is an amenable number.

642567470744 is a deficient number, since it is larger than the sum of its proper divisors (562946628976).

642567470744 is a wasteful number, since it uses less digits than its factorization.

642567470744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46672810 (or 46672806 counting only the distinct ones).

The product of its (nonzero) digits is 31610880, while the sum is 56.

The spelling of 642567470744 in words is "six hundred forty-two billion, five hundred sixty-seven million, four hundred seventy thousand, seven hundred forty-four".