10521816145 has 8 divisors (see below), whose sum is σ = 12635464680. Its totient is φ = 8411262720.

The previous prime is 10521816079. The next prime is 10521816191. The reversal of 10521816145 is 54161812501.

It can be written as a sum of positive squares in 4 ways, for example, as 455907904 + 10065908241 = 21352^2 + 100329^2 .

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

It is not a de Polignac number, because 10521816145 - 2⁷ = 10521816017 is a prime.

It is a super-2 number, since 2×10521816145² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 10521816145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 766290 + ... + 779899.

It is an arithmetic number, because the mean of its divisors is an integer number (1579433085).

Almost surely, 2^10521816145 is an apocalyptic number.

It is an amenable number.

10521816145 is a deficient number, since it is larger than the sum of its proper divisors (2113648535).

10521816145 is a wasteful number, since it uses less digits than its factorization.

10521816145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547555.

The product of its (nonzero) digits is 9600, while the sum is 34.

The spelling of 10521816145 in words is "ten billion, five hundred twenty-one million, eight hundred sixteen thousand, one hundred forty-five".