138724203327518 has 8 divisors (see below), whose sum is σ = 209724779834112. Its totient is φ = 68815943382816.

The previous prime is 138724203327511. The next prime is 138724203327547. The reversal of 138724203327518 is 815723302427831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138724203327518² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138724203327511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273079140155 + ... + 273079140662.

It is an arithmetic number, because the mean of its divisors is an integer number (26215597479264).

Almost surely, 2^{138724203327518} is an apocalyptic number.

138724203327518 is a deficient number, since it is larger than the sum of its proper divisors (71000576506594).

138724203327518 is a wasteful number, since it uses less digits than its factorization.

138724203327518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546158280946.

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 138724203327518 in words is "one hundred thirty-eight trillion, seven hundred twenty-four billion, two hundred three million, three hundred twenty-seven thousand, five hundred eighteen".