139087706778 has 12 divisors (see below), whose sum is σ = 301356698058. Its totient is φ = 46362568920.

The previous prime is 139087706773. The next prime is 139087706827. The reversal of 139087706778 is 877607780931.

It can be written as a sum of positive squares in only one way, i.e., 92795172129 + 46292534649 = 304623^2 + 215157^2 .

It is not an unprimeable number, because it can be changed into a prime (139087706773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3863547393 + ... + 3863547428.

Almost surely, 2^139087706778 is an apocalyptic number.

139087706778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

139087706778 is an abundant number, since it is smaller than the sum of its proper divisors (162268991280).

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

139087706778 is a wasteful number, since it uses less digits than its factorization.

139087706778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727094829 (or 7727094826 counting only the distinct ones).

The product of its (nonzero) digits is 24893568, while the sum is 63.

The spelling of 139087706778 in words is "one hundred thirty-nine billion, eighty-seven million, seven hundred six thousand, seven hundred seventy-eight".