681901088 has 48 divisors (see below), whose sum is σ = 1469482560. Its totient is φ = 308908800.

The previous prime is 681901081. The next prime is 681901091. The reversal of 681901088 is 880109186.

It is not an unprimeable number, because it can be changed into a prime (681901081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106358 + ... + 112586.

It is an arithmetic number, because the mean of its divisors is an integer number (30614220).

Almost surely, 2^681901088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681901088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734741280).

681901088 is an abundant number, since it is smaller than the sum of its proper divisors (787581472).

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

681901088 is a wasteful number, since it uses less digits than its factorization.

681901088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6561 (or 6553 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 681901088 is about 26113.2358776158. The cubic root of 681901088 is about 880.1846582185.

The spelling of 681901088 in words is "six hundred eighty-one million, nine hundred one thousand, eighty-eight".