10520542402553 has 4 divisors (see below), whose sum is σ = 10520582962788. Its totient is φ = 10520501842320.

The previous prime is 10520542402493. The next prime is 10520542402567. The reversal of 10520542402553 is 35520424502501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8913496860304 + 1607045542249 = 2985548^2 + 1267693^2 .

It is a cyclic number.

It is not a de Polignac number, because 10520542402553 - 2⁴⁰ = 9421030774777 is a prime.

It is a super-2 number, since 2×10520542402553² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10520542402753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19888526 + ... + 20410647.

It is an arithmetic number, because the mean of its divisors is an integer number (2630145740697).

Almost surely, 2^{10520542402553} is an apocalyptic number.

It is an amenable number.

10520542402553 is a deficient number, since it is larger than the sum of its proper divisors (40560235).

10520542402553 is an equidigital number, since it uses as much as digits as its factorization.

10520542402553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40560234.

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 10520542402553 in words is "ten trillion, five hundred twenty billion, five hundred forty-two million, four hundred two thousand, five hundred fifty-three".