855892144457 has 4 divisors (see below), whose sum is σ = 978162450816. Its totient is φ = 733621838100.

The previous prime is 855892144433. The next prime is 855892144463. The reversal of 855892144457 is 754441298558.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 855892144457 - 2²⁴ = 855875367241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 855892144457.

It is not an unprimeable number, because it can be changed into a prime (855892144157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61135153169 + ... + 61135153182.

It is an arithmetic number, because the mean of its divisors is an integer number (244540612704).

Almost surely, 2^855892144457 is an apocalyptic number.

It is an amenable number.

855892144457 is a deficient number, since it is larger than the sum of its proper divisors (122270306359).

855892144457 is a wasteful number, since it uses less digits than its factorization.

855892144457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122270306358.

The product of its digits is 64512000, while the sum is 62.

The spelling of 855892144457 in words is "eight hundred fifty-five billion, eight hundred ninety-two million, one hundred forty-four thousand, four hundred fifty-seven".