189454472212819 has 32 divisors (see below), whose sum is σ = 223981549977600. Its totient is φ = 158368464195840.

The previous prime is 189454472212801. The next prime is 189454472212829. The reversal of 189454472212819 is 918212274454981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189454472212819 is a prime.

It is a super-2 number, since 2×189454472212819² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189454472212829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26787667 + ... + 33113260.

It is an arithmetic number, because the mean of its divisors is an integer number (6999423436800).

Almost surely, 2^{189454472212819} is an apocalyptic number.

189454472212819 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

189454472212819 is a deficient number, since it is larger than the sum of its proper divisors (34527077764781).

189454472212819 is a wasteful number, since it uses less digits than its factorization.

189454472212819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59901403.

The product of its digits is 92897280, while the sum is 67.

The spelling of 189454472212819 in words is "one hundred eighty-nine trillion, four hundred fifty-four billion, four hundred seventy-two million, two hundred twelve thousand, eight hundred nineteen".