10643255312516 has 12 divisors (see below), whose sum is σ = 18977125038732. Its totient is φ = 5221219587168.

The previous prime is 10643255312513. The next prime is 10643255312531. The reversal of 10643255312516 is 61521355234601.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7669044644416 + 2974210668100 = 2769304^2 + 1724590^2 .

It is a super-2 number, since 2×10643255312516² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (10643255312513) 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 3 ways as a sum of consecutive naturals, for example, 25102017035 + ... + 25102017458.

It is an arithmetic number, because the mean of its divisors is an integer number (1581427086561).

Almost surely, 2^{10643255312516} is an apocalyptic number.

It is an amenable number.

10643255312516 is a deficient number, since it is larger than the sum of its proper divisors (8333869726216).

10643255312516 is a wasteful number, since it uses less digits than its factorization.

10643255312516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50204034550 (or 50204034548 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 10643255312516 in words is "ten trillion, six hundred forty-three billion, two hundred fifty-five million, three hundred twelve thousand, five hundred sixteen".