18275978256 has 20 divisors (see below), whose sum is σ = 47212943952. Its totient is φ = 6091992736.

The previous prime is 18275978249. The next prime is 18275978257. The reversal of 18275978256 is 65287957281.

It is a super-2 number, since 2×18275978256² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18275978256.

It is not an unprimeable number, because it can be changed into a prime (18275978257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190374726 + ... + 190374821.

Almost surely, 2^18275978256 is an apocalyptic number.

18275978256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18275978256 is an abundant number, since it is smaller than the sum of its proper divisors (28936965696).

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

18275978256 is a wasteful number, since it uses less digits than its factorization.

18275978256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380749558 (or 380749552 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 60.

The spelling of 18275978256 in words is "eighteen billion, two hundred seventy-five million, nine hundred seventy-eight thousand, two hundred fifty-six".