681532910 has 16 divisors (see below), whose sum is σ = 1228478400. Its totient is φ = 272231136.

The previous prime is 681532909. The next prime is 681532919. The reversal of 681532910 is 19235186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681532919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40205 + ... + 54584.

It is an arithmetic number, because the mean of its divisors is an integer number (76779900).

Almost surely, 2^681532910 is an apocalyptic number.

681532910 is a deficient number, since it is larger than the sum of its proper divisors (546945490).

681532910 is a wasteful number, since it uses less digits than its factorization.

681532910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95515.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 681532910 is about 26106.1852824192. The cubic root of 681532910 is about 880.0262173663.

The spelling of 681532910 in words is "six hundred eighty-one million, five hundred thirty-two thousand, nine hundred ten".