642605671712 has 24 divisors (see below), whose sum is σ = 1265150853036. Its totient is φ = 321297518592.

The previous prime is 642605671663. The next prime is 642605671753. The reversal of 642605671712 is 217176506246.

It can be written as a sum of positive squares in 2 ways, for example, as 552459212176 + 90146459536 = 743276^2 + 300244^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2414108 + ... + 2667044.

Almost surely, 2^642605671712 is an apocalyptic number.

It is an amenable number.

642605671712 is a deficient number, since it is larger than the sum of its proper divisors (622545181324).

642605671712 is a wasteful number, since it uses less digits than its factorization.

642605671712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332340 (or 332332 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 642605671712 in words is "six hundred forty-two billion, six hundred five million, six hundred seventy-one thousand, seven hundred twelve".