191457243453 has 16 divisors (see below), whose sum is σ = 291753418880. Its totient is φ = 109400746176.

The previous prime is 191457243449. The next prime is 191457243479. The reversal of 191457243453 is 354342754191.

It is not a de Polignac number, because 191457243453 - 2² = 191457243449 is a prime.

It is a super-2 number, since 2×191457243453² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191457243433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656643 + ... + 902271.

It is an arithmetic number, because the mean of its divisors is an integer number (18234588680).

Almost surely, 2^191457243453 is an apocalyptic number.

It is an amenable number.

191457243453 is a deficient number, since it is larger than the sum of its proper divisors (100296175427).

191457243453 is a wasteful number, since it uses less digits than its factorization.

191457243453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282756.

The product of its digits is 1814400, while the sum is 48.

The spelling of 191457243453 in words is "one hundred ninety-one billion, four hundred fifty-seven million, two hundred forty-three thousand, four hundred fifty-three".