199056820461 has 16 divisors (see below), whose sum is σ = 282447912384. Its totient is φ = 124264388864.

The previous prime is 199056820451. The next prime is 199056820477. The reversal of 199056820461 is 164028650991.

199056820461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 199056820461 - 2⁵ = 199056820429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199056820411) 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, 9896235 + ... + 9916328.

It is an arithmetic number, because the mean of its divisors is an integer number (17652994524).

Almost surely, 2^199056820461 is an apocalyptic number.

It is an amenable number.

199056820461 is a deficient number, since it is larger than the sum of its proper divisors (83391091923).

199056820461 is a wasteful number, since it uses less digits than its factorization.

199056820461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19812780.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 199056820461 in words is "one hundred ninety-nine billion, fifty-six million, eight hundred twenty thousand, four hundred sixty-one".