1020255965289 has 24 divisors (see below), whose sum is σ = 1609839945792. Its totient is φ = 617504687520.

The previous prime is 1020255965279. The next prime is 1020255965291. The reversal of 1020255965289 is 9825695520201.

1020255965289 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 2 + 559 + 6 + 5 + 2 + 89 = 666.

It is not a de Polignac number, because 1020255965289 - 2⁵ = 1020255965257 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1020255965279) 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 23 ways as a sum of consecutive naturals, for example, 6861582 + ... + 7008695.

It is an arithmetic number, because the mean of its divisors is an integer number (67076664408).

Almost surely, 2^{1020255965289} is an apocalyptic number.

It is an amenable number.

1020255965289 is a deficient number, since it is larger than the sum of its proper divisors (589583980503).

1020255965289 is a wasteful number, since it uses less digits than its factorization.

1020255965289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13871037 (or 13871034 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 54.

The spelling of 1020255965289 in words is "one trillion, twenty billion, two hundred fifty-five million, nine hundred sixty-five thousand, two hundred eighty-nine".