18155410416 has 640 divisors, whose sum is σ = 64595865600. Its totient is φ = 4836049920.

The previous prime is 18155410331. The next prime is 18155410487. The reversal of 18155410416 is 61401455181.

18155410416 is a `hidden beast` number, since 1 + 81 + 554 + 10 + 4 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 386285305 + ... + 386285351.

It is an arithmetic number, because the mean of its divisors is an integer number (100931040).

Almost surely, 2^18155410416 is an apocalyptic number.

18155410416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18155410416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32297932800).

18155410416 is an abundant number, since it is smaller than the sum of its proper divisors (46440455184).

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

18155410416 is a wasteful number, since it uses less digits than its factorization.

18155410416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

Adding to 18155410416 its reverse (61401455181), we get a palindrome (79556865597).

The spelling of 18155410416 in words is "eighteen billion, one hundred fifty-five million, four hundred ten thousand, four hundred sixteen".