1028529743681 has 4 divisors (see below), whose sum is σ = 1122032447664. Its totient is φ = 935027039700.

The previous prime is 1028529743671. The next prime is 1028529743713. The reversal of 1028529743681 is 1863479258201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1028529743681 - 2¹⁴ = 1028529727297 is a prime.

It is a super-2 number, since 2×1028529743681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028529743641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46751351975 + ... + 46751351996.

It is an arithmetic number, because the mean of its divisors is an integer number (280508111916).

It is a 1-persistent number, because it is pandigital, but 2⋅1028529743681 = 2057059487362 is not.

Almost surely, 2^{1028529743681} is an apocalyptic number.

1028529743681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1028529743681 is a deficient number, since it is larger than the sum of its proper divisors (93502703983).

1028529743681 is an equidigital number, since it uses as much as digits as its factorization.

1028529743681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93502703982.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 1028529743681 in words is "one trillion, twenty-eight billion, five hundred twenty-nine million, seven hundred forty-three thousand, six hundred eighty-one".