128499305701 has 8 divisors (see below), whose sum is σ = 138732447224. Its totient is φ = 118315961280.

The previous prime is 128499305663. The next prime is 128499305719. The reversal of 128499305701 is 107503994821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35166000676 + 93333305025 = 187526^2 + 305505^2 .

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 128499305701 - 2¹⁵ = 128499272933 is a prime.

It is a super-2 number, since 2×128499305701² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128499303701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12443910 + ... + 12454231.

It is an arithmetic number, because the mean of its divisors is an integer number (17341555903).

Almost surely, 2^128499305701 is an apocalyptic number.

It is an amenable number.

128499305701 is a deficient number, since it is larger than the sum of its proper divisors (10233141523).

128499305701 is a wasteful number, since it uses less digits than its factorization.

128499305701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24898551.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 128499305701 in words is "one hundred twenty-eight billion, four hundred ninety-nine million, three hundred five thousand, seven hundred one".