138791493120 has 160 divisors (see below), whose sum is σ = 507084830208. Its totient is φ = 31723757568.

The previous prime is 138791493083. The next prime is 138791493121. The reversal of 138791493120 is 21394197831.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 138791493120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138791493121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1237084 + ... + 1344603.

Almost surely, 2^138791493120 is an apocalyptic number.

138791493120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138791493120 is an abundant number, since it is smaller than the sum of its proper divisors (368293337088).

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

138791493120 is an equidigital number, since it uses as much as digits as its factorization.

138791493120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581720 (or 2581704 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 138791493120 in words is "one hundred thirty-eight billion, seven hundred ninety-one million, four hundred ninety-three thousand, one hundred twenty".