18561054486 has 64 divisors (see below), whose sum is σ = 41413498560. Its totient is φ = 5509109760.

The previous prime is 18561054467. The next prime is 18561054521. The reversal of 18561054486 is 68445016581.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252016 + ... + 317228.

It is an arithmetic number, because the mean of its divisors is an integer number (647085915).

Almost surely, 2^18561054486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18561054486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20706749280).

18561054486 is an abundant number, since it is smaller than the sum of its proper divisors (22852444074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18561054486 is a wasteful number, since it uses less digits than its factorization.

18561054486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65361.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 18561054486 in words is "eighteen billion, five hundred sixty-one million, fifty-four thousand, four hundred eighty-six".