138147989544456 has 32 divisors (see below), whose sum is σ = 345374147600640. Its totient is φ = 46048773349568.

The previous prime is 138147989544373. The next prime is 138147989544457. The reversal of 138147989544456 is 654445989741831.

It is not an unprimeable number, because it can be changed into a prime (138147989544457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32751411 + ... + 36728066.

It is an arithmetic number, because the mean of its divisors is an integer number (10792942112520).

Almost surely, 2^{138147989544456} is an apocalyptic number.

It is an amenable number.

138147989544456 is an abundant number, since it is smaller than the sum of its proper divisors (207226158056184).

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

138147989544456 is a wasteful number, since it uses less digits than its factorization.

138147989544456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69562333 (or 69562329 counting only the distinct ones).

The product of its digits is 4180377600, while the sum is 78.

The spelling of 138147989544456 in words is "one hundred thirty-eight trillion, one hundred forty-seven billion, nine hundred eighty-nine million, five hundred forty-four thousand, four hundred fifty-six".