501958643849 has 8 divisors (see below), whose sum is σ = 564073927872. Its totient is φ = 443200942800.

The previous prime is 501958643839. The next prime is 501958643881. The reversal of 501958643849 is 948346859105.

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 501958643849 - 2¹⁶ = 501958578313 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 501958643791 and 501958643800.

It is not an unprimeable number, because it can be changed into a prime (501958643839) 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 7 ways as a sum of consecutive naturals, for example, 839395427 + ... + 839396024.

It is an arithmetic number, because the mean of its divisors is an integer number (70509240984).

Almost surely, 2^501958643849 is an apocalyptic number.

It is an amenable number.

501958643849 is a deficient number, since it is larger than the sum of its proper divisors (62115284023).

501958643849 is a wasteful number, since it uses less digits than its factorization.

501958643849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678791487.

The product of its (nonzero) digits is 37324800, while the sum is 62.

The spelling of 501958643849 in words is "five hundred one billion, nine hundred fifty-eight million, six hundred forty-three thousand, eight hundred forty-nine".