8644428786503 has 16 divisors (see below), whose sum is σ = 8685328228416. Its totient is φ = 8603605451520.

The previous prime is 8644428786493. The next prime is 8644428786517. The reversal of 8644428786503 is 3056878244468.

It is a cyclic number.

It is not a de Polignac number, because 8644428786503 - 2³⁴ = 8627248917319 is a prime.

It is a super-2 number, since 2×8644428786503² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8644428786503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8644428786523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162976075 + ... + 1162983507.

It is an arithmetic number, because the mean of its divisors is an integer number (542833014276).

Almost surely, 2^{8644428786503} is an apocalyptic number.

8644428786503 is a deficient number, since it is larger than the sum of its proper divisors (40899441913).

8644428786503 is a wasteful number, since it uses less digits than its factorization.

8644428786503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11834.

The product of its (nonzero) digits is 247726080, while the sum is 65.

The spelling of 8644428786503 in words is "eight trillion, six hundred forty-four billion, four hundred twenty-eight million, seven hundred eighty-six thousand, five hundred three".