138580820604 has 18 divisors (see below), whose sum is σ = 350301518840. Its totient is φ = 46193606856.

The previous prime is 138580820579. The next prime is 138580820611. The reversal of 138580820604 is 406028085831.

138580820604 is a `hidden beast` number, since 1 + 3 + 8 + 580 + 8 + 2 + 0 + 60 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-5 number, since 5×138580820604⁵ (a number of 57 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138580820604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1924733584 + ... + 1924733655.

Almost surely, 2^138580820604 is an apocalyptic number.

It is an amenable number.

138580820604 is an abundant number, since it is smaller than the sum of its proper divisors (211720698236).

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

138580820604 is a wasteful number, since it uses less digits than its factorization.

138580820604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849467249 (or 3849467244 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 138580820604 in words is "one hundred thirty-eight billion, five hundred eighty million, eight hundred twenty thousand, six hundred four".