138185172580 has 192 divisors, whose sum is σ = 377317624320. Its totient is φ = 41281228800.

The previous prime is 138185172569. The next prime is 138185172611. The reversal of 138185172580 is 85271581831.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9709870 + ... + 9724090.

It is an arithmetic number, because the mean of its divisors is an integer number (1965195960).

Almost surely, 2^138185172580 is an apocalyptic number.

138185172580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138185172580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188658812160).

138185172580 is an abundant number, since it is smaller than the sum of its proper divisors (239132451740).

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

138185172580 is a wasteful number, since it uses less digits than its factorization.

138185172580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14550 (or 14548 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 49.

The spelling of 138185172580 in words is "one hundred thirty-eight billion, one hundred eighty-five million, one hundred seventy-two thousand, five hundred eighty".