213765640999 has 16 divisors (see below), whose sum is σ = 216318772800. Its totient is φ = 211232102400.

The previous prime is 213765640997. The next prime is 213765641017. The reversal of 213765640999 is 999046567312.

It is a cyclic number.

It is not a de Polignac number, because 213765640999 - 2¹ = 213765640997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213765640997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18587419 + ... + 18598915.

It is an arithmetic number, because the mean of its divisors is an integer number (13519923300).

Almost surely, 2^213765640999 is an apocalyptic number.

213765640999 is a deficient number, since it is larger than the sum of its proper divisors (2553131801).

213765640999 is a wasteful number, since it uses less digits than its factorization.

213765640999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12330.

The product of its (nonzero) digits is 22044960, while the sum is 61.

The spelling of 213765640999 in words is "two hundred thirteen billion, seven hundred sixty-five million, six hundred forty thousand, nine hundred ninety-nine".