189201947961 has 32 divisors (see below), whose sum is σ = 273441734272. Its totient is φ = 115675153920.

The previous prime is 189201947947. The next prime is 189201948043. The reversal of 189201947961 is 169749102981.

It is not a de Polignac number, because 189201947961 - 2⁷ = 189201947833 is a prime.

It is a super-2 number, since 2×189201947961² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189201947461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32500431 + ... + 32506251.

It is an arithmetic number, because the mean of its divisors is an integer number (8545054196).

Almost surely, 2^189201947961 is an apocalyptic number.

It is an amenable number.

189201947961 is a deficient number, since it is larger than the sum of its proper divisors (84239786311).

189201947961 is a wasteful number, since it uses less digits than its factorization.

189201947961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11113.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The spelling of 189201947961 in words is "one hundred eighty-nine billion, two hundred one million, nine hundred forty-seven thousand, nine hundred sixty-one".