129768534693 has 24 divisors (see below), whose sum is σ = 214231450368. Its totient is φ = 74149856352.

The previous prime is 129768534683. The next prime is 129768534703. The reversal of 129768534693 is 396435867921.

129768534693 is a `hidden beast` number, since 1 + 2 + 9 + 7 + 6 + 8 + 534 + 6 + 93 = 666.

It is an interprime number because it is at equal distance from previous prime (129768534683) and next prime (129768534703).

It is not a de Polignac number, because 129768534693 - 2⁶ = 129768534629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 129768534693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129768534613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1802596 + ... + 1873202.

It is an arithmetic number, because the mean of its divisors is an integer number (8926310432).

Almost surely, 2^129768534693 is an apocalyptic number.

It is an amenable number.

129768534693 is a deficient number, since it is larger than the sum of its proper divisors (84462915675).

129768534693 is a wasteful number, since it uses less digits than its factorization.

129768534693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99793 (or 99790 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

Adding to 129768534693 its sum of digits (63), we get a square (129768534756 = 360234²).

The spelling of 129768534693 in words is "one hundred twenty-nine billion, seven hundred sixty-eight million, five hundred thirty-four thousand, six hundred ninety-three".