61568718848 has 192 divisors, whose sum is σ = 160437775680. Its totient is φ = 22922919936.

The previous prime is 61568718823. The next prime is 61568718851. The reversal of 61568718848 is 84881786516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3158540 + ... + 3177972.

It is an arithmetic number, because the mean of its divisors is an integer number (835613415).

Almost surely, 2^61568718848 is an apocalyptic number.

61568718848 is a gapful number since it is divisible by the number (68) 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 61568718848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80218887840).

61568718848 is an abundant number, since it is smaller than the sum of its proper divisors (98869056832).

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

61568718848 is a wasteful number, since it uses less digits than its factorization.

61568718848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19492 (or 19472 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 62.

The spelling of 61568718848 in words is "sixty-one billion, five hundred sixty-eight million, seven hundred eighteen thousand, eight hundred forty-eight".