2180500268953 has 4 divisors (see below), whose sum is σ = 2180729877300. Its totient is φ = 2180270660608.

The previous prime is 2180500268927. The next prime is 2180500268959. The reversal of 2180500268953 is 3598620050812.

It is a happy number.

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 816108071769 + 1364392197184 = 903387^2 + 1168072^2 .

It is a cyclic number.

It is not a de Polignac number, because 2180500268953 - 2²¹ = 2180498171801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2180500268897 and 2180500268906.

It is not an unprimeable number, because it can be changed into a prime (2180500268959) 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, 114789928 + ... + 114808921.

It is an arithmetic number, because the mean of its divisors is an integer number (545182469325).

Almost surely, 2^{2180500268953} is an apocalyptic number.

It is an amenable number.

2180500268953 is a deficient number, since it is larger than the sum of its proper divisors (229608347).

2180500268953 is an equidigital number, since it uses as much as digits as its factorization.

2180500268953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229608346.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 2180500268953 in words is "two trillion, one hundred eighty billion, five hundred million, two hundred sixty-eight thousand, nine hundred fifty-three".