681088165380 has 864 divisors, whose sum is σ = 2540550684672. Its totient is φ = 144575746560.

The previous prime is 681088165369. The next prime is 681088165397. The reversal of 681088165380 is 83561880186.

681088165380 is a `hidden beast` number, since 6 + 8 + 10 + 88 + 16 + 538 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 5362898877 + ... + 5362899003.

Almost surely, 2^681088165380 is an apocalyptic number.

681088165380 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 681088165380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270275342336).

681088165380 is an abundant number, since it is smaller than the sum of its proper divisors (1859462519292).

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

681088165380 is a wasteful number, since it uses less digits than its factorization.

681088165380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 681088165380 in words is "six hundred eighty-one billion, eighty-eight million, one hundred sixty-five thousand, three hundred eighty".