189290469812 has 6 divisors (see below), whose sum is σ = 331258322178. Its totient is φ = 94645234904.

The previous prime is 189290469811. The next prime is 189290469817. The reversal of 189290469812 is 218964092981.

It can be written as a sum of positive squares in only one way, i.e., 189019735696 + 270734116 = 434764^2 + 16454^2 .

It is a super-3 number, since 3×189290469812³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189290469811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23661308723 + ... + 23661308730.

It is an arithmetic number, because the mean of its divisors is an integer number (55209720363).

Almost surely, 2^189290469812 is an apocalyptic number.

It is an amenable number.

189290469812 is a deficient number, since it is larger than the sum of its proper divisors (141967852366).

189290469812 is a wasteful number, since it uses less digits than its factorization.

189290469812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47322617457 (or 47322617455 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 59.

The spelling of 189290469812 in words is "one hundred eighty-nine billion, two hundred ninety million, four hundred sixty-nine thousand, eight hundred twelve".