129130578865 has 8 divisors (see below), whose sum is σ = 159144713640. Its totient is φ = 100512450432.

The previous prime is 129130578859. The next prime is 129130578877. The reversal of 129130578865 is 568875031921.

It can be written as a sum of positive squares in 4 ways, for example, as 48132849664 + 80997729201 = 219392^2 + 284601^2 .

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 129130578865 - 2²³ = 129122190257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349001380 + ... + 349001749.

It is an arithmetic number, because the mean of its divisors is an integer number (19893089205).

Almost surely, 2^129130578865 is an apocalyptic number.

It is an amenable number.

129130578865 is a deficient number, since it is larger than the sum of its proper divisors (30014134775).

129130578865 is an equidigital number, since it uses as much as digits as its factorization.

129130578865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698003171.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 129130578865 in words is "one hundred twenty-nine billion, one hundred thirty million, five hundred seventy-eight thousand, eight hundred sixty-five".