2135506989065 has 4 divisors (see below), whose sum is σ = 2562608386884. Its totient is φ = 1708405591248.

The previous prime is 2135506989059. The next prime is 2135506989113. The reversal of 2135506989065 is 5609896055312.

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 946946964544 + 1188560024521 = 973112^2 + 1090211^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135506989065 - 2²⁴ = 2135490211849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2135506988995 and 2135506989013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213550698902 + ... + 213550698911.

It is an arithmetic number, because the mean of its divisors is an integer number (640652096721).

Almost surely, 2^{2135506989065} is an apocalyptic number.

It is an amenable number.

2135506989065 is a deficient number, since it is larger than the sum of its proper divisors (427101397819).

2135506989065 is an equidigital number, since it uses as much as digits as its factorization.

2135506989065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427101397818.

The product of its (nonzero) digits is 17496000, while the sum is 59.

The spelling of 2135506989065 in words is "two trillion, one hundred thirty-five billion, five hundred six million, nine hundred eighty-nine thousand, sixty-five".