2165354261125 has 32 divisors (see below), whose sum is σ = 2948399326080. Its totient is φ = 1574606560000.

The previous prime is 2165354261101. The next prime is 2165354261141. The reversal of 2165354261125 is 5211624535612.

It is not a de Polignac number, because 2165354261125 - 2⁷ = 2165354260997 is a prime.

It is a super-3 number, since 3×2165354261125³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11413290 + ... + 11601460.

It is an arithmetic number, because the mean of its divisors is an integer number (92137478940).

Almost surely, 2^{2165354261125} is an apocalyptic number.

2165354261125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2165354261125 is a deficient number, since it is larger than the sum of its proper divisors (783045064955).

2165354261125 is a wasteful number, since it uses less digits than its factorization.

2165354261125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196566 (or 196556 counting only the distinct ones).

The product of its digits is 432000, while the sum is 43.

Adding to 2165354261125 its reverse (5211624535612), we get a palindrome (7376978796737).

The spelling of 2165354261125 in words is "two trillion, one hundred sixty-five billion, three hundred fifty-four million, two hundred sixty-one thousand, one hundred twenty-five".