129725077517 has 8 divisors (see below), whose sum is σ = 148259900736. Its totient is φ = 111190921632.

The previous prime is 129725077513. The next prime is 129725077523. The reversal of 129725077517 is 715770527921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129725077517 - 2² = 129725077513 is a prime.

It is a super-3 number, since 3×129725077517³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129725077511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361118 + ... + 624384.

It is an arithmetic number, because the mean of its divisors is an integer number (18532487592).

Almost surely, 2^129725077517 is an apocalyptic number.

It is an amenable number.

129725077517 is a deficient number, since it is larger than the sum of its proper divisors (18534823219).

129725077517 is an equidigital number, since it uses as much as digits as its factorization.

129725077517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333667.

The product of its (nonzero) digits is 2160900, while the sum is 53.

The spelling of 129725077517 in words is "one hundred twenty-nine billion, seven hundred twenty-five million, seventy-seven thousand, five hundred seventeen".