1028355012771 has 8 divisors (see below), whose sum is σ = 1371180943440. Its totient is φ = 685549545312.

The previous prime is 1028355012731. The next prime is 1028355012781. The reversal of 1028355012771 is 1772105538201.

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

It is not a de Polignac number, because 1028355012771 - 2²¹ = 1028352915619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1028355012731) 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, 4998156 + ... + 5199833.

It is an arithmetic number, because the mean of its divisors is an integer number (171397617930).

Almost surely, 2^{1028355012771} is an apocalyptic number.

1028355012771 is a deficient number, since it is larger than the sum of its proper divisors (342825930669).

1028355012771 is a wasteful number, since it uses less digits than its factorization.

1028355012771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10231605.

The product of its (nonzero) digits is 117600, while the sum is 42.

The spelling of 1028355012771 in words is "one trillion, twenty-eight billion, three hundred fifty-five million, twelve thousand, seven hundred seventy-one".