138855358480 has 20 divisors (see below), whose sum is σ = 322838708652. Its totient is φ = 55542143360.

The previous prime is 138855358457. The next prime is 138855358493. The reversal of 138855358480 is 84853558831.

It can be written as a sum of positive squares in 2 ways, for example, as 40025604096 + 98829754384 = 200064^2 + 314372^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×138855358480³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 867845911 + ... + 867846070.

Almost surely, 2^138855358480 is an apocalyptic number.

138855358480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138855358480 is an abundant number, since it is smaller than the sum of its proper divisors (183983350172).

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

138855358480 is a wasteful number, since it uses less digits than its factorization.

138855358480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735691994 (or 1735691988 counting only the distinct ones).

The product of its (nonzero) digits is 18432000, while the sum is 58.

The spelling of 138855358480 in words is "one hundred thirty-eight billion, eight hundred fifty-five million, three hundred fifty-eight thousand, four hundred eighty".