189672458078 has 4 divisors (see below), whose sum is σ = 284508687120. Its totient is φ = 94836229038.

The previous prime is 189672458077. The next prime is 189672458083. The reversal of 189672458078 is 870854276981.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189672458077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47418114518 + ... + 47418114521.

It is an arithmetic number, because the mean of its divisors is an integer number (71127171780).

Almost surely, 2^189672458078 is an apocalyptic number.

189672458078 is a deficient number, since it is larger than the sum of its proper divisors (94836229042).

189672458078 is an equidigital number, since it uses as much as digits as its factorization.

189672458078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94836229041.

The product of its (nonzero) digits is 54190080, while the sum is 65.

The spelling of 189672458078 in words is "one hundred eighty-nine billion, six hundred seventy-two million, four hundred fifty-eight thousand, seventy-eight".