138863683745208 has 48 divisors (see below), whose sum is σ = 384091040155680. Its totient is φ = 45303045759744.

The previous prime is 138863683745123. The next prime is 138863683745249. The reversal of 138863683745208 is 802547386368831.

138863683745208 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 6 + 3 + 68 + 37 + 4 + 520 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20517680385 + ... + 20517687152.

It is an arithmetic number, because the mean of its divisors is an integer number (8001896669910).

Almost surely, 2^{138863683745208} is an apocalyptic number.

138863683745208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138863683745208 is an abundant number, since it is smaller than the sum of its proper divisors (245227356410472).

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

138863683745208 is a wasteful number, since it uses less digits than its factorization.

138863683745208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41035367596 (or 41035367589 counting only the distinct ones).

The product of its (nonzero) digits is 1114767360, while the sum is 72.

The spelling of 138863683745208 in words is "one hundred thirty-eight trillion, eight hundred sixty-three billion, six hundred eighty-three million, seven hundred forty-five thousand, two hundred eight".