191449656553 has 8 divisors (see below), whose sum is σ = 199778529600. Its totient is φ = 183121198128.

The previous prime is 191449656539. The next prime is 191449656569. The reversal of 191449656553 is 355656944191.

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

It is a cyclic number.

It is not a de Polignac number, because 191449656553 - 2¹³ = 191449648361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191449656533) 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, 1176378 + ... + 1329196.

It is an arithmetic number, because the mean of its divisors is an integer number (24972316200).

Almost surely, 2^191449656553 is an apocalyptic number.

It is an amenable number.

191449656553 is a deficient number, since it is larger than the sum of its proper divisors (8328873047).

191449656553 is a wasteful number, since it uses less digits than its factorization.

191449656553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207311.

The product of its digits is 17496000, while the sum is 58.

The spelling of 191449656553 in words is "one hundred ninety-one billion, four hundred forty-nine million, six hundred fifty-six thousand, five hundred fifty-three".