191447098447 has 32 divisors (see below), whose sum is σ = 220896000000. Its totient is φ = 164215434240.

The previous prime is 191447098321. The next prime is 191447098481. The reversal of 191447098447 is 744890744191.

It is a de Polignac number, because none of the positive numbers 2^k-191447098447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191447098391 and 191447098400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191447098747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24959929 + ... + 24967597.

It is an arithmetic number, because the mean of its divisors is an integer number (6903000000).

Almost surely, 2^191447098447 is an apocalyptic number.

191447098447 is a deficient number, since it is larger than the sum of its proper divisors (29448901553).

191447098447 is a wasteful number, since it uses less digits than its factorization.

191447098447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 191447098447 in words is "one hundred ninety-one billion, four hundred forty-seven million, ninety-eight thousand, four hundred forty-seven".