128529997155629 has 8 divisors (see below), whose sum is σ = 128987847861240. Its totient is φ = 128072149632000.

The previous prime is 128529997155617. The next prime is 128529997155653. The reversal of 128529997155629 is 926551799925821.

It can be written as a sum of positive squares in 4 ways, for example, as 69138775990729 + 59391221164900 = 8314973^2 + 7706570^2 .

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 128529997155629 - 2¹⁶ = 128529997090093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128529997155689) 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, 105274127 + ... + 106488035.

It is an arithmetic number, because the mean of its divisors is an integer number (16123480982655).

Almost surely, 2^{128529997155629} is an apocalyptic number.

It is an amenable number.

128529997155629 is a deficient number, since it is larger than the sum of its proper divisors (457850705611).

128529997155629 is a wasteful number, since it uses less digits than its factorization.

128529997155629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590991.

The product of its digits is 2204496000, while the sum is 80.

The spelling of 128529997155629 in words is "one hundred twenty-eight trillion, five hundred twenty-nine billion, nine hundred ninety-seven million, one hundred fifty-five thousand, six hundred twenty-nine".