128570537281 has 8 divisors (see below), whose sum is σ = 130768953120. Its totient is φ = 126380340768.

The previous prime is 128570537231. The next prime is 128570537341. The reversal of 128570537281 is 182735075821.

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 128570537281 - 2²¹ = 128568440129 is a prime.

It is a super-2 number, since 2×128570537281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128570537231) 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, 2023276 + ... + 2085853.

It is an arithmetic number, because the mean of its divisors is an integer number (16346119140).

Almost surely, 2^128570537281 is an apocalyptic number.

It is an amenable number.

128570537281 is a deficient number, since it is larger than the sum of its proper divisors (2198415839).

128570537281 is an equidigital number, since it uses as much as digits as its factorization.

128570537281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4109663.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 128570537281 in words is "one hundred twenty-eight billion, five hundred seventy million, five hundred thirty-seven thousand, two hundred eighty-one".