12405247551 has 32 divisors (see below), whose sum is σ = 18616677120. Its totient is φ = 8163385632.

The previous prime is 12405247549. The next prime is 12405247567. The reversal of 12405247551 is 15574250421.

12405247551 is a `hidden beast` number, since 1 + 2 + 405 + 247 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 12405247551 - 2¹ = 12405247549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405245551) 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 31 ways as a sum of consecutive naturals, for example, 810001 + ... + 825173.

It is an arithmetic number, because the mean of its divisors is an integer number (581771160).

Almost surely, 2^12405247551 is an apocalyptic number.

12405247551 is a deficient number, since it is larger than the sum of its proper divisors (6211429569).

12405247551 is a wasteful number, since it uses less digits than its factorization.

12405247551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15572 (or 15566 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

Adding to 12405247551 its reverse (15574250421), we get a palindrome (27979497972).

The spelling of 12405247551 in words is "twelve billion, four hundred five million, two hundred forty-seven thousand, five hundred fifty-one".