681500724829 has 8 divisors (see below), whose sum is σ = 688273651800. Its totient is φ = 674728296000.

The previous prime is 681500724823. The next prime is 681500724847. The reversal of 681500724829 is 928427005186.

It can be written as a sum of positive squares in 4 ways, for example, as 413204696100 + 268296028729 = 642810^2 + 517973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681500724829 - 2³¹ = 679353241181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681500724823) 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, 3016839 + ... + 3234859.

It is an arithmetic number, because the mean of its divisors is an integer number (86034206475).

Almost surely, 2^681500724829 is an apocalyptic number.

It is an amenable number.

681500724829 is a deficient number, since it is larger than the sum of its proper divisors (6772926971).

681500724829 is a wasteful number, since it uses less digits than its factorization.

681500724829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249071.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 681500724829 in words is "six hundred eighty-one billion, five hundred million, seven hundred twenty-four thousand, eight hundred twenty-nine".