129054096081 has 9 divisors (see below), whose sum is σ = 186413028841. Its totient is φ = 86035345572.

The previous prime is 129054096053. The next prime is 129054096139. The reversal of 129054096081 is 180690450921.

The square root of 129054096081 is 359241.

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

129054096081 is a `hidden beast` number, since 1 + 29 + 0 + 540 + 9 + 6 + 0 + 81 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-129054096081 is a prime.

It is a super-2 number, since 2×129054096081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129054096011) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1017850 + ... + 1137596.

Almost surely, 2^129054096081 is an apocalyptic number.

129054096081 is the 359241-st square number.

129054096081 is the 179621-st centered octagonal number.

It is an amenable number.

129054096081 is a deficient number, since it is larger than the sum of its proper divisors (57358932760).

129054096081 is an frugal number, since it uses more digits than its factorization.

129054096081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239500 (or 119750 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 129054096081 in words is "one hundred twenty-nine billion, fifty-four million, ninety-six thousand, eighty-one".