3634188971213 has 4 divisors (see below), whose sum is σ = 3634244026620. Its totient is φ = 3634133915808.

The previous prime is 3634188971209. The next prime is 3634188971249. The reversal of 3634188971213 is 3121798814363.

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 296417091364 + 3337771879849 = 544442^2 + 1826957^2 .

It is a cyclic number.

It is not a de Polignac number, because 3634188971213 - 2² = 3634188971209 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 (3634188941213) 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, 27428570 + ... + 27560747.

It is an arithmetic number, because the mean of its divisors is an integer number (908561006655).

Almost surely, 2^{3634188971213} is an apocalyptic number.

It is an amenable number.

3634188971213 is a deficient number, since it is larger than the sum of its proper divisors (55055407).

3634188971213 is an equidigital number, since it uses as much as digits as its factorization.

3634188971213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55055406.

The product of its digits is 5225472, while the sum is 56.

The spelling of 3634188971213 in words is "three trillion, six hundred thirty-four billion, one hundred eighty-eight million, nine hundred seventy-one thousand, two hundred thirteen".