1002564238189 has 4 divisors (see below), whose sum is σ = 1002616008156. Its totient is φ = 1002512468224.

The previous prime is 1002564238139. The next prime is 1002564238199. The reversal of 1002564238189 is 9818324652001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 559197362025 + 443366876164 = 747795^2 + 665858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002564238189 - 2³⁹ = 452808424301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002564238139) 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, 25855924 + ... + 25894669.

It is an arithmetic number, because the mean of its divisors is an integer number (250654002039).

Almost surely, 2^{1002564238189} is an apocalyptic number.

It is an amenable number.

1002564238189 is a deficient number, since it is larger than the sum of its proper divisors (51769967).

1002564238189 is an equidigital number, since it uses as much as digits as its factorization.

1002564238189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51769966.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 1002564238189 in words is "one trillion, two billion, five hundred sixty-four million, two hundred thirty-eight thousand, one hundred eighty-nine".