4642139509 has 12 divisors (see below), whose sum is σ = 5402889324. Its totient is φ = 3976877184.

The previous prime is 4642139507. The next prime is 4642139531. The reversal of 4642139509 is 9059312464.

It can be written as a sum of positive squares in 2 ways, for example, as 887146225 + 3754993284 = 29785^2 + 61278^2 .

It is not a de Polignac number, because 4642139509 - 2¹ = 4642139507 is a prime.

It is a super-2 number, since 2×4642139509² = 43098918442037522162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4642139503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72669 + ... + 120685.

It is an arithmetic number, because the mean of its divisors is an integer number (450240777).

Almost surely, 2^4642139509 is an apocalyptic number.

4642139509 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

4642139509 is a deficient number, since it is larger than the sum of its proper divisors (760749815).

4642139509 is a wasteful number, since it uses less digits than its factorization.

4642139509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50004 (or 49997 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 4642139509 is about 68133.2481905861. The cubic root of 4642139509 is about 1668.1665020825.

The spelling of 4642139509 in words is "four billion, six hundred forty-two million, one hundred thirty-nine thousand, five hundred nine".