138187219190 has 16 divisors (see below), whose sum is σ = 249727983120. Its totient is φ = 55054668000.

The previous prime is 138187219187. The next prime is 138187219243. The reversal of 138187219190 is 91912781831.

It is a happy number.

It is a super-2 number, since 2×138187219190² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27524825 + ... + 27529844.

It is an arithmetic number, because the mean of its divisors is an integer number (15607998945).

Almost surely, 2^138187219190 is an apocalyptic number.

138187219190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138187219190 is a deficient number, since it is larger than the sum of its proper divisors (111540763930).

138187219190 is a wasteful number, since it uses less digits than its factorization.

138187219190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55054927.

The product of its (nonzero) digits is 217728, while the sum is 50.

The spelling of 138187219190 in words is "one hundred thirty-eight billion, one hundred eighty-seven million, two hundred nineteen thousand, one hundred ninety".