128165190729 has 8 divisors (see below), whose sum is σ = 170897298432. Its totient is φ = 85438271760.

The previous prime is 128165190661. The next prime is 128165190767. The reversal of 128165190729 is 927091561821.

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

It is not a de Polignac number, because 128165190729 - 2¹¹ = 128165188681 is a prime.

It is a super-2 number, since 2×128165190729² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128165190779) 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, 1239177 + ... + 1338614.

It is an arithmetic number, because the mean of its divisors is an integer number (21362162304).

Almost surely, 2^128165190729 is an apocalyptic number.

It is an amenable number.

128165190729 is a deficient number, since it is larger than the sum of its proper divisors (42732107703).

128165190729 is a wasteful number, since it uses less digits than its factorization.

128165190729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594367.

The product of its (nonzero) digits is 544320, while the sum is 51.

The spelling of 128165190729 in words is "one hundred twenty-eight billion, one hundred sixty-five million, one hundred ninety thousand, seven hundred twenty-nine".