129150018991 has 16 divisors (see below), whose sum is σ = 154678477824. Its totient is φ = 105432490944.

The previous prime is 129150018979. The next prime is 129150019013. The reversal of 129150018991 is 199810051921.

It is a cyclic number.

It is not a de Polignac number, because 129150018991 - 2⁷ = 129150018863 is a prime.

It is a super-3 number, since 3×129150018991³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129150013991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1683891 + ... + 1758916.

It is an arithmetic number, because the mean of its divisors is an integer number (9667404864).

Almost surely, 2^129150018991 is an apocalyptic number.

129150018991 is a deficient number, since it is larger than the sum of its proper divisors (25528458833).

129150018991 is a wasteful number, since it uses less digits than its factorization.

129150018991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3443070.

The product of its (nonzero) digits is 58320, while the sum is 46.

The spelling of 129150018991 in words is "one hundred twenty-nine billion, one hundred fifty million, eighteen thousand, nine hundred ninety-one".