897121255571 has 8 divisors (see below), whose sum is σ = 980534807424. Its totient is φ = 817112338560.

The previous prime is 897121255567. The next prime is 897121255601. The reversal of 897121255571 is 175552121798.

It is a happy number.

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

It is not a de Polignac number, because 897121255571 - 2² = 897121255567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897121255501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851158160 + ... + 851159213.

It is an arithmetic number, because the mean of its divisors is an integer number (122566850928).

Almost surely, 2^897121255571 is an apocalyptic number.

897121255571 is a deficient number, since it is larger than the sum of its proper divisors (83413551853).

897121255571 is a wasteful number, since it uses less digits than its factorization.

897121255571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702317421.

The product of its digits is 1764000, while the sum is 53.

The spelling of 897121255571 in words is "eight hundred ninety-seven billion, one hundred twenty-one million, two hundred fifty-five thousand, five hundred seventy-one".