891352253197 has 8 divisors (see below), whose sum is σ = 1053815472000. Its totient is φ = 737670830064.

The previous prime is 891352253189. The next prime is 891352253227. The reversal of 891352253197 is 791352253198.

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

It is not a de Polignac number, because 891352253197 - 2³ = 891352253189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891352253117) 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, 2195448697 + ... + 2195449102.

It is an arithmetic number, because the mean of its divisors is an integer number (131726934000).

Almost surely, 2^891352253197 is an apocalyptic number.

It is an amenable number.

891352253197 is a deficient number, since it is larger than the sum of its proper divisors (162463218803).

891352253197 is a wasteful number, since it uses less digits than its factorization.

891352253197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390897835.

The product of its digits is 4082400, while the sum is 55.

Subtracting from 891352253197 its reverse (791352253198), we obtain a palindrome (99999999999).

The spelling of 891352253197 in words is "eight hundred ninety-one billion, three hundred fifty-two million, two hundred fifty-three thousand, one hundred ninety-seven".