10644547989 has 8 divisors (see below), whose sum is σ = 14193889920. Its totient is φ = 7095785696.

The previous prime is 10644547951. The next prime is 10644547993. The reversal of 10644547989 is 98974544601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10644547989 - 2²⁰ = 10643499413 is a prime.

It is a super-2 number, since 2×10644547989² (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 (10644547489) 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, 100077 + ... + 176930.

It is an arithmetic number, because the mean of its divisors is an integer number (1774236240).

Almost surely, 2^10644547989 is an apocalyptic number.

It is an amenable number.

10644547989 is a deficient number, since it is larger than the sum of its proper divisors (3549341931).

10644547989 is a wasteful number, since it uses less digits than its factorization.

10644547989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289819.

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 10644547989 in words is "ten billion, six hundred forty-four million, five hundred forty-seven thousand, nine hundred eighty-nine".