129842697681316 has 81 divisors (see below), whose sum is σ = 236658889884963. Its totient is φ = 62330762968320.

The previous prime is 129842697681311. The next prime is 129842697681443. The reversal of 129842697681316 is 613186796248921.

The square root of 129842697681316 is 11394854.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 13542002562916 + 116300695118400 = 3679946^2 + 10784280^2 .

It is a super-2 number, since 2×129842697681316² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129842697681311) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 147381041196 + ... + 147381042076.

Almost surely, 2^{129842697681316} is an apocalyptic number.

129842697681316 is the 11394854-th square number.

It is an amenable number.

129842697681316 is a deficient number, since it is larger than the sum of its proper divisors (106816192203647).

129842697681316 is an frugal number, since it uses more digits than its factorization.

129842697681316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270 (or 1135 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 73.

The spelling of 129842697681316 in words is "one hundred twenty-nine trillion, eight hundred forty-two billion, six hundred ninety-seven million, six hundred eighty-one thousand, three hundred sixteen".