12554521011 has 6 divisors (see below), whose sum is σ = 18134308140. Its totient is φ = 8369680668.

The previous prime is 12554520977. The next prime is 12554521013. The reversal of 12554521011 is 11012545521.

It is a happy number.

12554521011 is a `hidden beast` number, since 1 + 2 + 554 + 5 + 2 + 101 + 1 = 666.

It is not a de Polignac number, because 12554521011 - 2²² = 12550326707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12554521013) 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 5 ways as a sum of consecutive naturals, for example, 697473381 + ... + 697473398.

It is an arithmetic number, because the mean of its divisors is an integer number (3022384690).

Almost surely, 2^12554521011 is an apocalyptic number.

12554521011 is a deficient number, since it is larger than the sum of its proper divisors (5579787129).

12554521011 is a wasteful number, since it uses less digits than its factorization.

12554521011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394946785 (or 1394946782 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The spelling of 12554521011 in words is "twelve billion, five hundred fifty-four million, five hundred twenty-one thousand, eleven".