213455635026440 has 16 divisors (see below), whose sum is σ = 480275178809580. Its totient is φ = 85382254010560.

The previous prime is 213455635026437. The next prime is 213455635026449. The reversal of 213455635026440 is 44620536554312.

It can be written as a sum of positive squares in 2 ways, for example, as 200769685939684 + 12685949086756 = 14169322^2 + 3561734^2 .

It is not an unprimeable number, because it can be changed into a prime (213455635026449) 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, 2668195437791 + ... + 2668195437870.

Almost surely, 2^{213455635026440} is an apocalyptic number.

213455635026440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213455635026440 is an abundant number, since it is smaller than the sum of its proper divisors (266819543783140).

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

213455635026440 is a wasteful number, since it uses less digits than its factorization.

213455635026440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336390875672 (or 5336390875668 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 50.

The spelling of 213455635026440 in words is "two hundred thirteen trillion, four hundred fifty-five billion, six hundred thirty-five million, twenty-six thousand, four hundred forty".