2165450227640 has 32 divisors (see below), whose sum is σ = 5568300586080. Its totient is φ = 742440077952.

The previous prime is 2165450227639. The next prime is 2165450227643. The reversal of 2165450227640 is 467220545612.

It is a super-2 number, since 2×2165450227640² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2165450227591 and 2165450227600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165450227643) 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, 3866875127 + ... + 3866875686.

It is an arithmetic number, because the mean of its divisors is an integer number (174009393315).

Almost surely, 2^{2165450227640} is an apocalyptic number.

2165450227640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165450227640 is an abundant number, since it is smaller than the sum of its proper divisors (3402850358440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2165450227640 is a wasteful number, since it uses less digits than its factorization.

2165450227640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7733750831 (or 7733750827 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 2165450227640 in words is "two trillion, one hundred sixty-five billion, four hundred fifty million, two hundred twenty-seven thousand, six hundred forty".