61848218916 has 144 divisors (see below), whose sum is σ = 182124633600. Its totient is φ = 17511782400.

The previous prime is 61848218909. The next prime is 61848218963. The reversal of 61848218916 is 61981284816.

It is a happy number.

61848218916 is a `hidden beast` number, since 61 + 8 + 482 + 18 + 91 + 6 = 666.

61848218916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 269140 + ... + 442868.

It is an arithmetic number, because the mean of its divisors is an integer number (1264754400).

Almost surely, 2^61848218916 is an apocalyptic number.

61848218916 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61848218916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91062316800).

61848218916 is an abundant number, since it is smaller than the sum of its proper divisors (120276414684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61848218916 is a wasteful number, since it uses less digits than its factorization.

61848218916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173810 (or 173805 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The spelling of 61848218916 in words is "sixty-one billion, eight hundred forty-eight million, two hundred eighteen thousand, nine hundred sixteen".