61208818355880 has 768 divisors, whose sum is σ = 232580148595200. Its totient is φ = 14225003827200.

The previous prime is 61208818355873. The next prime is 61208818355929. The reversal of 61208818355880 is 8855381880216.

61208818355880 is a `hidden beast` number, since 6 + 1 + 2 + 0 + 8 + 8 + 18 + 35 + 588 + 0 = 666.

It is a super-2 number, since 2×61208818355880² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 553134717 + ... + 553245363.

It is an arithmetic number, because the mean of its divisors is an integer number (302838735150).

Almost surely, 2^{61208818355880} is an apocalyptic number.

61208818355880 is a gapful number since it is divisible by the number (60) 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 61208818355880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116290074297600).

61208818355880 is an abundant number, since it is smaller than the sum of its proper divisors (171371330239320).

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

61208818355880 is a wasteful number, since it uses less digits than its factorization.

61208818355880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110783 (or 110742 counting only the distinct ones).

The product of its (nonzero) digits is 29491200, while the sum is 63.

The spelling of 61208818355880 in words is "sixty-one trillion, two hundred eight billion, eight hundred eighteen million, three hundred fifty-five thousand, eight hundred eighty".