138185620470 has 96 divisors (see below), whose sum is σ = 380685883968. Its totient is φ = 34657357824.

The previous prime is 138185620459. The next prime is 138185620471. The reversal of 138185620470 is 74026581831.

138185620470 is a `hidden beast` number, since 1 + 3 + 8 + 18 + 5 + 620 + 4 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138185620471) 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 in 47 ways as a sum of consecutive naturals, for example, 2182702 + ... + 2245118.

It is an arithmetic number, because the mean of its divisors is an integer number (3965477958).

Almost surely, 2^138185620470 is an apocalyptic number.

138185620470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138185620470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190342941984).

138185620470 is an abundant number, since it is smaller than the sum of its proper divisors (242500263498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138185620470 is a wasteful number, since it uses less digits than its factorization.

138185620470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63894 (or 63891 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 138185620470 in words is "one hundred thirty-eight billion, one hundred eighty-five million, six hundred twenty thousand, four hundred seventy".