213749965264869 has 24 divisors (see below), whose sum is σ = 339908201661600. Its totient is φ = 128356943271840.

The previous prime is 213749965264831. The next prime is 213749965264873. The reversal of 213749965264869 is 968462569947312.

213749965264869 is a `hidden beast` number, since 2 + 1 + 3 + 7 + 4 + 9 + 9 + 6 + 526 + 4 + 86 + 9 = 666.

It is not a de Polignac number, because 213749965264869 - 2²⁴ = 213749948487653 is a prime.

It is a super-2 number, since 2×213749965264869² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213749965264469) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9904074339 + ... + 9904095920.

It is an arithmetic number, because the mean of its divisors is an integer number (14162841735900).

Almost surely, 2^{213749965264869} is an apocalyptic number.

It is an amenable number.

213749965264869 is a deficient number, since it is larger than the sum of its proper divisors (126158236396731).

213749965264869 is a wasteful number, since it uses less digits than its factorization.

213749965264869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19808170385 (or 19808170382 counting only the distinct ones).

The product of its digits is 8465264640, while the sum is 81.

The spelling of 213749965264869 in words is "two hundred thirteen trillion, seven hundred forty-nine billion, nine hundred sixty-five million, two hundred sixty-four thousand, eight hundred sixty-nine".