189789652993 has 16 divisors (see below), whose sum is σ = 193075344000. Its totient is φ = 186534410112.

The previous prime is 189789652991. The next prime is 189789652999. The reversal of 189789652993 is 399256987981.

It is a cyclic number.

It is not a de Polignac number, because 189789652993 - 2¹ = 189789652991 is a prime.

It is a super-2 number, since 2×189789652993² (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 (189789652991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19979421 + ... + 19988917.

It is an arithmetic number, because the mean of its divisors is an integer number (12067209000).

Almost surely, 2^189789652993 is an apocalyptic number.

It is an amenable number.

189789652993 is a deficient number, since it is larger than the sum of its proper divisors (3285691007).

189789652993 is a wasteful number, since it uses less digits than its factorization.

189789652993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11064.

The product of its digits is 529079040, while the sum is 76.

The spelling of 189789652993 in words is "one hundred eighty-nine billion, seven hundred eighty-nine million, six hundred fifty-two thousand, nine hundred ninety-three".