12640280054 has 16 divisors (see below), whose sum is σ = 19651921920. Its totient is φ = 6090477120.

The previous prime is 12640280053. The next prime is 12640280069. The reversal of 12640280054 is 45008204621.

It is a self number, because there is not a number n which added to its sum of digits gives 12640280054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640280053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178934 + ... + 239369.

It is an arithmetic number, because the mean of its divisors is an integer number (1228245120).

Almost surely, 2^12640280054 is an apocalyptic number.

12640280054 is a deficient number, since it is larger than the sum of its proper divisors (7011641866).

12640280054 is a wasteful number, since it uses less digits than its factorization.

12640280054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418855.

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 12640280054 its reverse (45008204621), we get a palindrome (57648484675).

The spelling of 12640280054 in words is "twelve billion, six hundred forty million, two hundred eighty thousand, fifty-four".