129427619143876 has 9 divisors (see below), whose sum is σ = 226498373319981. Its totient is φ = 64713798195312.

The previous prime is 129427619143829. The next prime is 129427619143877. The reversal of 129427619143876 is 678341916724921.

The square root of 129427619143876 is 11376626.

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

129427619143876 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 45385956348100 + 84041662795776 = 6736910^2 + 9167424^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129427619143877) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 19909096 + ... + 25597408.

Almost surely, 2^{129427619143876} is an apocalyptic number.

129427619143876 is the 11376626-th square number.

It is an amenable number.

129427619143876 is a deficient number, since it is larger than the sum of its proper divisors (97070754176105).

129427619143876 is an frugal number, since it uses more digits than its factorization.

129427619143876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11376630 (or 5688315 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 70.

The spelling of 129427619143876 in words is "one hundred twenty-nine trillion, four hundred twenty-seven billion, six hundred nineteen million, one hundred forty-three thousand, eight hundred seventy-six".