642262530370061 has 4 divisors (see below), whose sum is σ = 642323046966972. Its totient is φ = 642202013773152.

The previous prime is 642262530370007. The next prime is 642262530370067. The reversal of 642262530370061 is 160073035262246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 625765984549225 + 16496545820836 = 25015315^2 + 4061594^2 .

It is a cyclic number.

It is not a de Polignac number, because 642262530370061 - 2³⁰ = 642261456628237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642262530369988 and 642262530370015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642262530370067) 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, 30258282536 + ... + 30258303761.

It is an arithmetic number, because the mean of its divisors is an integer number (160580761741743).

Almost surely, 2^{642262530370061} is an apocalyptic number.

It is an amenable number.

642262530370061 is a deficient number, since it is larger than the sum of its proper divisors (60516596911).

642262530370061 is a wasteful number, since it uses less digits than its factorization.

642262530370061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60516596910.

The product of its (nonzero) digits is 2177280, while the sum is 47.

The spelling of 642262530370061 in words is "six hundred forty-two trillion, two hundred sixty-two billion, five hundred thirty million, three hundred seventy thousand, sixty-one".