642416152643 has 4 divisors (see below), whose sum is σ = 642951054888. Its totient is φ = 641881250400.

The previous prime is 642416152621. The next prime is 642416152757. The reversal of 642416152643 is 346251614246.

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

It is a cyclic number.

It is not a de Polignac number, because 642416152643 - 2¹⁶ = 642416087107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642416152594 and 642416152603.

It is not an unprimeable number, because it can be changed into a prime (642412152643) 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, 267449321 + ... + 267451722.

It is an arithmetic number, because the mean of its divisors is an integer number (160737763722).

Almost surely, 2^642416152643 is an apocalyptic number.

642416152643 is a deficient number, since it is larger than the sum of its proper divisors (534902245).

642416152643 is a wasteful number, since it uses less digits than its factorization.

642416152643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534902244.

The product of its digits is 829440, while the sum is 44.

Adding to 642416152643 its reverse (346251614246), we get a palindrome (988667766889).

The spelling of 642416152643 in words is "six hundred forty-two billion, four hundred sixteen million, one hundred fifty-two thousand, six hundred forty-three".