10544555421 has 24 divisors (see below), whose sum is σ = 15594518784. Its totient is φ = 6862695840.

The previous prime is 10544555393. The next prime is 10544555423. The reversal of 10544555421 is 12455544501.

10544555421 is a `hidden beast` number, since 10 + 54 + 4 + 55 + 542 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-10544555421 is a prime.

It is a super-2 number, since 2×10544555421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10544555423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136536 + ... + 199326.

It is an arithmetic number, because the mean of its divisors is an integer number (649771616).

Almost surely, 2^10544555421 is an apocalyptic number.

It is an amenable number.

10544555421 is a deficient number, since it is larger than the sum of its proper divisors (5049963363).

10544555421 is a wasteful number, since it uses less digits than its factorization.

10544555421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63241 (or 63238 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The spelling of 10544555421 in words is "ten billion, five hundred forty-four million, five hundred fifty-five thousand, four hundred twenty-one".