129465763830728 has 64 divisors (see below), whose sum is σ = 261496546584000. Its totient is φ = 59736222911232.

The previous prime is 129465763830713. The next prime is 129465763830761. The reversal of 129465763830728 is 827038367564921.

It is a super-2 number, since 2×129465763830728² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8392146551 + ... + 8392161977.

It is an arithmetic number, because the mean of its divisors is an integer number (4085883540375).

It is a 1-persistent number, because it is pandigital, but 2⋅129465763830728 = 258931527661456 is not.

Almost surely, 2^{129465763830728} is an apocalyptic number.

It is an amenable number.

129465763830728 is an abundant number, since it is smaller than the sum of its proper divisors (132030782753272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129465763830728 is a wasteful number, since it uses less digits than its factorization.

129465763830728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33454 (or 33450 counting only the distinct ones).

The product of its (nonzero) digits is 731566080, while the sum is 71.

The spelling of 129465763830728 in words is "one hundred twenty-nine trillion, four hundred sixty-five billion, seven hundred sixty-three million, eight hundred thirty thousand, seven hundred twenty-eight".