10557521365 has 4 divisors (see below), whose sum is σ = 12669025644. Its totient is φ = 8446017088.

The previous prime is 10557521357. The next prime is 10557521383. The reversal of 10557521365 is 56312575501.

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 2180329636 + 8377191729 = 46694^2 + 91527^2 .

It is a cyclic number.

It is not a de Polignac number, because 10557521365 - 2³ = 10557521357 is a prime.

It is a super-2 number, since 2×10557521365² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055752132 + ... + 1055752141.

It is an arithmetic number, because the mean of its divisors is an integer number (3167256411).

Almost surely, 2^10557521365 is an apocalyptic number.

It is an amenable number.

10557521365 is a deficient number, since it is larger than the sum of its proper divisors (2111504279).

10557521365 is an equidigital number, since it uses as much as digits as its factorization.

10557521365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111504278.

The product of its (nonzero) digits is 157500, while the sum is 40.

The spelling of 10557521365 in words is "ten billion, five hundred fifty-seven million, five hundred twenty-one thousand, three hundred sixty-five".