138120237848844 has 96 divisors (see below), whose sum is σ = 360151113853440. Its totient is φ = 45775561374144.

The previous prime is 138120237848819. The next prime is 138120237848867. The reversal of 138120237848844 is 448848732021831.

138120237848844 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 20 + 23 + 78 + 488 + 44 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14424082 + ... + 22006694.

It is an arithmetic number, because the mean of its divisors is an integer number (3751574102640).

Almost surely, 2^{138120237848844} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138120237848844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180075556926720).

138120237848844 is an abundant number, since it is smaller than the sum of its proper divisors (222030876004596).

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

138120237848844 is a wasteful number, since it uses less digits than its factorization.

138120237848844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7583596 (or 7583588 counting only the distinct ones).

The product of its (nonzero) digits is 66060288, while the sum is 63.

The spelling of 138120237848844 in words is "one hundred thirty-eight trillion, one hundred twenty billion, two hundred thirty-seven million, eight hundred forty-eight thousand, eight hundred forty-four".