13520442545 has 8 divisors (see below), whose sum is σ = 16253662824. Its totient is φ = 10796932864.

The previous prime is 13520442511. The next prime is 13520442563. The reversal of 13520442545 is 54524402531.

It can be written as a sum of positive squares in 4 ways, for example, as 253319056 + 13267123489 = 15916^2 + 115183^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13520442545 - 2¹⁰ = 13520441521 is a prime.

It is a super-2 number, since 2×13520442545² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 2424584 + ... + 2430153.

It is an arithmetic number, because the mean of its divisors is an integer number (2031707853).

Almost surely, 2^13520442545 is an apocalyptic number.

It is an amenable number.

13520442545 is a deficient number, since it is larger than the sum of its proper divisors (2733220279).

13520442545 is an equidigital number, since it uses as much as digits as its factorization.

13520442545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4855299.

The product of its (nonzero) digits is 96000, while the sum is 35.

The spelling of 13520442545 in words is "thirteen billion, five hundred twenty million, four hundred forty-two thousand, five hundred forty-five".