681463415220 has 192 divisors, whose sum is σ = 2304301547520. Its totient is φ = 147104635392.

The previous prime is 681463415209. The next prime is 681463415239. The reversal of 681463415220 is 22514364186.

It is a super-2 number, since 2×681463415220² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 316654 + ... + 1209626.

It is an arithmetic number, because the mean of its divisors is an integer number (12001570560).

Almost surely, 2^681463415220 is an apocalyptic number.

681463415220 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 681463415220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152150773760).

681463415220 is an abundant number, since it is smaller than the sum of its proper divisors (1622838132300).

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

681463415220 is a wasteful number, since it uses less digits than its factorization.

681463415220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893094 (or 893092 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 681463415220 in words is "six hundred eighty-one billion, four hundred sixty-three million, four hundred fifteen thousand, two hundred twenty".