13654542661 has 4 divisors (see below), whose sum is σ = 13673534400. Its totient is φ = 13635550924.

The previous prime is 13654542637. The next prime is 13654542667. The reversal of 13654542661 is 16624545631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16624545631 = 1283 ⋅12957557.

It is a cyclic number.

It is not a de Polignac number, because 13654542661 - 2¹⁵ = 13654509893 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 (13654542667) 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, 9494791 + ... + 9496228.

It is an arithmetic number, because the mean of its divisors is an integer number (3418383600).

Almost surely, 2^13654542661 is an apocalyptic number.

It is an amenable number.

13654542661 is a deficient number, since it is larger than the sum of its proper divisors (18991739).

13654542661 is an equidigital number, since it uses as much as digits as its factorization.

13654542661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18991738.

The product of its digits is 518400, while the sum is 43.

The spelling of 13654542661 in words is "thirteen billion, six hundred fifty-four million, five hundred forty-two thousand, six hundred sixty-one".