13611005647021 has 8 divisors (see below), whose sum is σ = 14376816168704. Its totient is φ = 12865616739360.

The previous prime is 13611005646941. The next prime is 13611005647091. The reversal of 13611005647021 is 12074650011631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13611005647021 - 2¹³ = 13611005638829 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 (13611005647091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5105402136 + ... + 5105404801.

It is an arithmetic number, because the mean of its divisors is an integer number (1797102021088).

Almost surely, 2^{13611005647021} is an apocalyptic number.

It is an amenable number.

13611005647021 is a deficient number, since it is larger than the sum of its proper divisors (765810521683).

13611005647021 is a wasteful number, since it uses less digits than its factorization.

13611005647021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210807011.

The product of its (nonzero) digits is 30240, while the sum is 37.

Adding to 13611005647021 its reverse (12074650011631), we get a palindrome (25685655658652).

The spelling of 13611005647021 in words is "thirteen trillion, six hundred eleven billion, five million, six hundred forty-seven thousand, twenty-one".