13455531857 has 4 divisors (see below), whose sum is σ = 13553747556. Its totient is φ = 13357316160.

The previous prime is 13455531833. The next prime is 13455531877. The reversal of 13455531857 is 75813555431.

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 7697605696 + 5757926161 = 87736^2 + 75881^2 .

It is a cyclic number.

It is not a de Polignac number, because 13455531857 - 2⁸ = 13455531601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13455531877) 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, 49107644 + ... + 49107917.

It is an arithmetic number, because the mean of its divisors is an integer number (3388436889).

Almost surely, 2^13455531857 is an apocalyptic number.

It is an amenable number.

13455531857 is a deficient number, since it is larger than the sum of its proper divisors (98215699).

13455531857 is an equidigital number, since it uses as much as digits as its factorization.

13455531857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98215698.

The product of its digits is 1260000, while the sum is 47.

The spelling of 13455531857 in words is "thirteen billion, four hundred fifty-five million, five hundred thirty-one thousand, eight hundred fifty-seven".