642322638248 has 32 divisors (see below), whose sum is σ = 1237212873000. Its totient is φ = 312403525632.

The previous prime is 642322638241. The next prime is 642322638271. The reversal of 642322638248 is 842836223246.

It can be written as a sum of positive squares in 4 ways, for example, as 585993312004 + 56329326244 = 765502^2 + 237338^2 .

It is a junction number, because it is equal to n+sod(n) for n = 642322638196 and 642322638205.

It is not an unprimeable number, because it can be changed into a prime (642322638241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930536 + ... + 1466472.

Almost surely, 2^642322638248 is an apocalyptic number.

It is an amenable number.

642322638248 is a deficient number, since it is larger than the sum of its proper divisors (594890234752).

642322638248 is a wasteful number, since it uses less digits than its factorization.

642322638248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540029 (or 540025 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 50.

The spelling of 642322638248 in words is "six hundred forty-two billion, three hundred twenty-two million, six hundred thirty-eight thousand, two hundred forty-eight".