199081756996557 has 8 divisors (see below), whose sum is σ = 265448013361440. Its totient is φ = 132718335981360.

The previous prime is 199081756996501. The next prime is 199081756996559. The reversal of 199081756996557 is 755699657180991.

It is a happy number.

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

It is not a de Polignac number, because 199081756996557 - 2²⁰ = 199081755947981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199081756996559) 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, 708673582 + ... + 708954447.

It is an arithmetic number, because the mean of its divisors is an integer number (33181001670180).

Almost surely, 2^{199081756996557} is an apocalyptic number.

It is an amenable number.

199081756996557 is a deficient number, since it is larger than the sum of its proper divisors (66366256364883).

199081756996557 is a wasteful number, since it uses less digits than its factorization.

199081756996557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417674843.

The product of its (nonzero) digits is 11573604000, while the sum is 87.

The spelling of 199081756996557 in words is "one hundred ninety-nine trillion, eighty-one billion, seven hundred fifty-six million, nine hundred ninety-six thousand, five hundred fifty-seven".