13805242557 has 8 divisors (see below), whose sum is σ = 18410582784. Its totient is φ = 9201698688.

The previous prime is 13805242501. The next prime is 13805242559. The reversal of 13805242557 is 75524250831.

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

It is not a de Polignac number, because 13805242557 - 2¹⁰ = 13805241533 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13805242559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431053 + ... + 461970.

It is an arithmetic number, because the mean of its divisors is an integer number (2301322848).

Almost surely, 2^13805242557 is an apocalyptic number.

It is an amenable number.

13805242557 is a deficient number, since it is larger than the sum of its proper divisors (4605340227).

13805242557 is an equidigital number, since it uses as much as digits as its factorization.

13805242557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898179.

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 13805242557 in words is "thirteen billion, eight hundred five million, two hundred forty-two thousand, five hundred fifty-seven".