18485888256 has 648 divisors, whose sum is σ = 64787768640. Its totient is φ = 5185382400.

The previous prime is 18485888249. The next prime is 18485888263. The reversal of 18485888256 is 65288858481.

18485888256 is a `hidden beast` number, since 1 + 8 + 48 + 588 + 8 + 2 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (18485888249) and next prime (18485888263).

It is a super-2 number, since 2×18485888256² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18485888193 and 18485888202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 596318961 + ... + 596318991.

Almost surely, 2^18485888256 is an apocalyptic number.

18485888256 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 18485888256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32393884320).

18485888256 is an abundant number, since it is smaller than the sum of its proper divisors (46301880384).

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

18485888256 is a wasteful number, since it uses less digits than its factorization.

18485888256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 70 counting only the distinct ones).

The product of its digits is 39321600, while the sum is 63.

The spelling of 18485888256 in words is "eighteen billion, four hundred eighty-five million, eight hundred eighty-eight thousand, two hundred fifty-six".