642484363831 has 8 divisors (see below), whose sum is σ = 645233546160. Its totient is φ = 639741013632.

The previous prime is 642484363777. The next prime is 642484363847. The reversal of 642484363831 is 138363484246.

It is a happy number.

642484363831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642484363831 - 2¹⁵ = 642484331063 is a prime.

It is a super-2 number, since 2×642484363831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642484363231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1237165 + ... + 1677958.

It is an arithmetic number, because the mean of its divisors is an integer number (80654193270).

Almost surely, 2^642484363831 is an apocalyptic number.

642484363831 is a deficient number, since it is larger than the sum of its proper divisors (2749182329).

642484363831 is a wasteful number, since it uses less digits than its factorization.

642484363831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916065.

The product of its digits is 7962624, while the sum is 52.

The spelling of 642484363831 in words is "six hundred forty-two billion, four hundred eighty-four million, three hundred sixty-three thousand, eight hundred thirty-one".