189074209606478 has 32 divisors (see below), whose sum is σ = 325023117032448. Its totient is φ = 80807846263200.

The previous prime is 189074209606433. The next prime is 189074209606507. The reversal of 189074209606478 is 874606902470981.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132988793 + ... + 134403003.

It is an arithmetic number, because the mean of its divisors is an integer number (10156972407264).

Almost surely, 2^{189074209606478} is an apocalyptic number.

189074209606478 is a deficient number, since it is larger than the sum of its proper divisors (135948907425970).

189074209606478 is a wasteful number, since it uses less digits than its factorization.

189074209606478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440608.

The product of its (nonzero) digits is 292626432, while the sum is 71.

The spelling of 189074209606478 in words is "one hundred eighty-nine trillion, seventy-four billion, two hundred nine million, six hundred six thousand, four hundred seventy-eight".