10645421256 has 96 divisors (see below), whose sum is σ = 29695723200. Its totient is φ = 3442642560.

The previous prime is 10645421231. The next prime is 10645421257. The reversal of 10645421256 is 65212454601.

10645421256 is a `hidden beast` number, since 1 + 0 + 64 + 542 + 1 + 2 + 56 = 666.

It is a super-2 number, since 2×10645421256² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 10645421256.

It is not an unprimeable number, because it can be changed into a prime (10645421257) 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, 950811 + ... + 961941.

It is an arithmetic number, because the mean of its divisors is an integer number (309330450).

Almost surely, 2^10645421256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10645421256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14847861600).

10645421256 is an abundant number, since it is smaller than the sum of its proper divisors (19050301944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10645421256 is a wasteful number, since it uses less digits than its factorization.

10645421256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11539 (or 11532 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 10645421256 its reverse (65212454601), we get a palindrome (75857875857).

The spelling of 10645421256 in words is "ten billion, six hundred forty-five million, four hundred twenty-one thousand, two hundred fifty-six".