137993487218 has 16 divisors (see below), whose sum is σ = 219957355224. Its totient is φ = 64703673600.

The previous prime is 137993487211. The next prime is 137993487241. The reversal of 137993487218 is 812784399731.

137993487218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 68783979289 + 69209507929 = 262267^2 + 263077^2 .

It is not an unprimeable number, because it can be changed into a prime (137993487211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7316633 + ... + 7335468.

Almost surely, 2^137993487218 is an apocalyptic number.

137993487218 is a deficient number, since it is larger than the sum of its proper divisors (81963868006).

137993487218 is a wasteful number, since it uses less digits than its factorization.

137993487218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14652397.

The product of its digits is 18289152, while the sum is 62.

The spelling of 137993487218 in words is "one hundred thirty-seven billion, nine hundred ninety-three million, four hundred eighty-seven thousand, two hundred eighteen".