188742715447 has 32 divisors (see below), whose sum is σ = 222416409600. Its totient is φ = 157903000320.

The previous prime is 188742715423. The next prime is 188742715481. The reversal of 188742715447 is 744517247881.

It is a de Polignac number, because none of the positive numbers 2^k-188742715447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 188742715391 and 188742715400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188742715417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102187878 + ... + 102189724.

It is an arithmetic number, because the mean of its divisors is an integer number (6950512800).

Almost surely, 2^188742715447 is an apocalyptic number.

188742715447 is a deficient number, since it is larger than the sum of its proper divisors (33673694153).

188742715447 is a wasteful number, since it uses less digits than its factorization.

188742715447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663.

The product of its digits is 14049280, while the sum is 58.

The spelling of 188742715447 in words is "one hundred eighty-eight billion, seven hundred forty-two million, seven hundred fifteen thousand, four hundred forty-seven".