139878243648 has 672 divisors, whose sum is σ = 503256499200. Its totient is φ = 36539596800.

The previous prime is 139878243647. The next prime is 139878243667. The reversal of 139878243648 is 846342878931.

139878243648 is a `hidden beast` number, since 1 + 3 + 9 + 87 + 82 + 436 + 48 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139878243647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 74047888 + ... + 74049776.

It is an arithmetic number, because the mean of its divisors is an integer number (748893600).

Almost surely, 2^139878243648 is an apocalyptic number.

139878243648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139878243648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251628249600).

139878243648 is an abundant number, since it is smaller than the sum of its proper divisors (363378255552).

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

139878243648 is a wasteful number, since it uses less digits than its factorization.

139878243648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991 (or 1978 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The spelling of 139878243648 in words is "one hundred thirty-nine billion, eight hundred seventy-eight million, two hundred forty-three thousand, six hundred forty-eight".