4909818655861 has 8 divisors (see below), whose sum is σ = 5611728799040. Its totient is φ = 4208035382208.

The previous prime is 4909818655837. The next prime is 4909818655873. The reversal of 4909818655861 is 1685568189094.

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

It is not a de Polignac number, because 4909818655861 - 2⁵ = 4909818655829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4909818655811) 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, 31634436 + ... + 31789261.

It is an arithmetic number, because the mean of its divisors is an integer number (701466099880).

Almost surely, 2^{4909818655861} is an apocalyptic number.

It is an amenable number.

4909818655861 is a deficient number, since it is larger than the sum of its proper divisors (701910143179).

4909818655861 is a wasteful number, since it uses less digits than its factorization.

4909818655861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63434763.

The product of its (nonzero) digits is 149299200, while the sum is 70.

The spelling of 4909818655861 in words is "four trillion, nine hundred nine billion, eight hundred eighteen million, six hundred fifty-five thousand, eight hundred sixty-one".