191253894403 has 16 divisors (see below), whose sum is σ = 225151347456. Its totient is φ = 160163166240.

The previous prime is 191253894389. The next prime is 191253894443. The reversal of 191253894403 is 304498352191.

191253894403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 191253894403 - 2³³ = 182663959811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191253894443) 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 15 ways as a sum of consecutive naturals, for example, 1303501 + ... + 1442782.

It is an arithmetic number, because the mean of its divisors is an integer number (14071959216).

Almost surely, 2^191253894403 is an apocalyptic number.

191253894403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

191253894403 is a deficient number, since it is larger than the sum of its proper divisors (33897453053).

191253894403 is a wasteful number, since it uses less digits than its factorization.

191253894403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746794.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 191253894403 in words is "one hundred ninety-one billion, two hundred fifty-three million, eight hundred ninety-four thousand, four hundred three".