138243403370 has 8 divisors (see below), whose sum is σ = 248838126084. Its totient is φ = 55297361344.

The previous prime is 138243403339. The next prime is 138243403373. The reversal of 138243403370 is 73304342831.

It can be written as a sum of positive squares in 2 ways, for example, as 127984347001 + 10259056369 = 357749^2 + 101287^2 .

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

It is a super-2 number, since 2×138243403370² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138243403373) 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, 6912170159 + ... + 6912170178.

Almost surely, 2^138243403370 is an apocalyptic number.

138243403370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138243403370 is a deficient number, since it is larger than the sum of its proper divisors (110594722714).

138243403370 is a wasteful number, since it uses less digits than its factorization.

138243403370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13824340344.

The product of its (nonzero) digits is 145152, while the sum is 38.

The spelling of 138243403370 in words is "one hundred thirty-eight billion, two hundred forty-three million, four hundred three thousand, three hundred seventy".