138782502777 has 4 divisors (see below), whose sum is σ = 185043337040. Its totient is φ = 92521668516.

The previous prime is 138782502773. The next prime is 138782502787. The reversal of 138782502777 is 777205287831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 138782502777 - 2² = 138782502773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138782502773) 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 3 ways as a sum of consecutive naturals, for example, 23130417127 + ... + 23130417132.

It is an arithmetic number, because the mean of its divisors is an integer number (46260834260).

Almost surely, 2^138782502777 is an apocalyptic number.

It is an amenable number.

138782502777 is a deficient number, since it is larger than the sum of its proper divisors (46260834263).

138782502777 is an equidigital number, since it uses as much as digits as its factorization.

138782502777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46260834262.

The product of its (nonzero) digits is 9219840, while the sum is 57.

The spelling of 138782502777 in words is "one hundred thirty-eight billion, seven hundred eighty-two million, five hundred two thousand, seven hundred seventy-seven".