4938618561 has 8 divisors (see below), whose sum is σ = 6668177280. Its totient is φ = 3250736112.

The previous prime is 4938618527. The next prime is 4938618569. The reversal of 4938618561 is 1658168394.

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

It is a de Polignac number, because none of the positive numbers 2^k-4938618561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4938618569) 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, 10418790 + ... + 10419263.

It is an arithmetic number, because the mean of its divisors is an integer number (833522160).

Almost surely, 2^4938618561 is an apocalyptic number.

It is an amenable number.

4938618561 is a deficient number, since it is larger than the sum of its proper divisors (1729558719).

4938618561 is a wasteful number, since it uses less digits than its factorization.

4938618561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20838135.

The product of its digits is 1244160, while the sum is 51.

The square root of 4938618561 is about 70275.3054849283. The cubic root of 4938618561 is about 1702.9497301849.

The spelling of 4938618561 in words is "four billion, nine hundred thirty-eight million, six hundred eighteen thousand, five hundred sixty-one".