199876812601 has 2 divisors, whose sum is σ = 199876812602. Its totient is φ = 199876812600.

The previous prime is 199876812593. The next prime is 199876812649. The reversal of 199876812601 is 106218678991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193159371001 + 6717441600 = 439499^2 + 81960^2 .

It is a cyclic number.

It is not a de Polignac number, because 199876812601 - 2³ = 199876812593 is a prime.

It is a super-3 number, since 3×199876812601³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (199876612601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99938406300 + 99938406301.

It is an arithmetic number, because the mean of its divisors is an integer number (99938406301).

Almost surely, 2^199876812601 is an apocalyptic number.

It is an amenable number.

199876812601 is a deficient number, since it is larger than the sum of its proper divisors (1).

199876812601 is an equidigital number, since it uses as much as digits as its factorization.

199876812601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 58.

The spelling of 199876812601 in words is "one hundred ninety-nine billion, eight hundred seventy-six million, eight hundred twelve thousand, six hundred one".