189236423477 has 16 divisors (see below), whose sum is σ = 198884952960. Its totient is φ = 179801633088.

The previous prime is 189236423449. The next prime is 189236423479. The reversal of 189236423477 is 774324632981.

It is a happy number.

It is not a de Polignac number, because 189236423477 - 2¹⁶ = 189236357941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189236423479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1888328 + ... + 1986014.

It is an arithmetic number, because the mean of its divisors is an integer number (12430309560).

Almost surely, 2^189236423477 is an apocalyptic number.

It is an amenable number.

189236423477 is a deficient number, since it is larger than the sum of its proper divisors (9648529483).

189236423477 is an equidigital number, since it uses as much as digits as its factorization.

189236423477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98780.

The product of its digits is 12192768, while the sum is 56.

The spelling of 189236423477 in words is "one hundred eighty-nine billion, two hundred thirty-six million, four hundred twenty-three thousand, four hundred seventy-seven".