12551433456 has 40 divisors (see below), whose sum is σ = 32433102720. Its totient is φ = 4182705856.

The previous prime is 12551433451. The next prime is 12551433467. The reversal of 12551433456 is 65433415521.

It is a happy number.

It is a super-2 number, since 2×12551433456² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551433451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160381 + ... + 225443.

It is an arithmetic number, because the mean of its divisors is an integer number (810827568).

Almost surely, 2^12551433456 is an apocalyptic number.

12551433456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12551433456 is an abundant number, since it is smaller than the sum of its proper divisors (19881669264).

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

12551433456 is a wasteful number, since it uses less digits than its factorization.

12551433456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69093 (or 69087 counting only the distinct ones).

The product of its digits is 216000, while the sum is 39.

Adding to 12551433456 its reverse (65433415521), we get a palindrome (77984848977).

The spelling of 12551433456 in words is "twelve billion, five hundred fifty-one million, four hundred thirty-three thousand, four hundred fifty-six".