139108636782 has 48 divisors (see below), whose sum is σ = 310365360240. Its totient is φ = 44997192576.

The previous prime is 139108636757. The next prime is 139108636831. The reversal of 139108636782 is 287636801931.

139108636782 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23143 + ... + 527970.

It is an arithmetic number, because the mean of its divisors is an integer number (6465945005).

Almost surely, 2^139108636782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139108636782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155182680120).

139108636782 is an abundant number, since it is smaller than the sum of its proper divisors (171256723458).

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

139108636782 is a wasteful number, since it uses less digits than its factorization.

139108636782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551537 (or 551534 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 139108636782 in words is "one hundred thirty-nine billion, one hundred eight million, six hundred thirty-six thousand, seven hundred eighty-two".