18124075661 has 16 divisors (see below), whose sum is σ = 19187750400. Its totient is φ = 17071589808.

The previous prime is 18124075637. The next prime is 18124075679. The reversal of 18124075661 is 16657042181.

It is a cyclic number.

It is not a de Polignac number, because 18124075661 - 2¹⁰ = 18124074637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18124075621) 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, 3806000 + ... + 3810758.

It is an arithmetic number, because the mean of its divisors is an integer number (1199234400).

Almost surely, 2^18124075661 is an apocalyptic number.

It is an amenable number.

18124075661 is a deficient number, since it is larger than the sum of its proper divisors (1063674739).

18124075661 is a wasteful number, since it uses less digits than its factorization.

18124075661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5888.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 18124075661 in words is "eighteen billion, one hundred twenty-four million, seventy-five thousand, six hundred sixty-one".