145113728138 has 4 divisors (see below), whose sum is σ = 217670592210. Its totient is φ = 72556864068.

The previous prime is 145113728131. The next prime is 145113728147. The reversal of 145113728138 is 831827311541.

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

It can be written as a sum of positive squares in only one way, i.e., 144379480729 + 734247409 = 379973^2 + 27097^2 .

It is not an unprimeable number, because it can be changed into a prime (145113728131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36278432033 + ... + 36278432036.

Almost surely, 2^145113728138 is an apocalyptic number.

145113728138 is a deficient number, since it is larger than the sum of its proper divisors (72556864072).

145113728138 is an equidigital number, since it uses as much as digits as its factorization.

145113728138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72556864071.

The product of its digits is 161280, while the sum is 44.

The spelling of 145113728138 in words is "one hundred forty-five billion, one hundred thirteen million, seven hundred twenty-eight thousand, one hundred thirty-eight".