129768534755 has 8 divisors (see below), whose sum is σ = 155724835392. Its totient is φ = 103813098688.

The previous prime is 129768534737. The next prime is 129768534767. The reversal of 129768534755 is 557435867921.

It is a Cunningham number, because it is equal to 360234²-1.

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 129768534755 - 2⁸ = 129768534499 is a prime.

It is a super-2 number, since 2×129768534755² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 180119 + ... + 540351.

It is an arithmetic number, because the mean of its divisors is an integer number (19465604424).

Almost surely, 2^129768534755 is an apocalyptic number.

129768534755 is a deficient number, since it is larger than the sum of its proper divisors (25956300637).

129768534755 is an equidigital number, since it uses as much as digits as its factorization.

129768534755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432285.

The product of its digits is 63504000, while the sum is 62.

The spelling of 129768534755 in words is "one hundred twenty-nine billion, seven hundred sixty-eight million, five hundred thirty-four thousand, seven hundred fifty-five".