1065521745553 has 16 divisors (see below), whose sum is σ = 1113595995600. Its totient is φ = 1018210636800.

The previous prime is 1065521745521. The next prime is 1065521745571. The reversal of 1065521745553 is 3555471255601.

It can be written as a sum of positive squares in 8 ways, for example, as 600333635344 + 465188110209 = 774812^2 + 682047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1065521745553 - 2⁵ = 1065521745521 is a prime.

It is a super-2 number, since 2×1065521745553² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1065521745497 and 1065521745506.

It is not an unprimeable number, because it can be changed into a prime (1065521145553) 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, 7879333 + ... + 8013421.

It is an arithmetic number, because the mean of its divisors is an integer number (69599749725).

Almost surely, 2^{1065521745553} is an apocalyptic number.

It is an amenable number.

1065521745553 is a deficient number, since it is larger than the sum of its proper divisors (48074250047).

1065521745553 is a wasteful number, since it uses less digits than its factorization.

1065521745553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136932.

The product of its (nonzero) digits is 3150000, while the sum is 49.

The spelling of 1065521745553 in words is "one trillion, sixty-five billion, five hundred twenty-one million, seven hundred forty-five thousand, five hundred fifty-three".