138787001082785 has 64 divisors (see below), whose sum is σ = 188373595299840. Its totient is φ = 97286197029120.

The previous prime is 138787001082761. The next prime is 138787001082787. The reversal of 138787001082785 is 587280100787831.

It is not a de Polignac number, because 138787001082785 - 2¹⁸ = 138787000820641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138787001082787) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 616288427 + ... + 616513583.

It is an arithmetic number, because the mean of its divisors is an integer number (2943337426560).

Almost surely, 2^{138787001082785} is an apocalyptic number.

It is an amenable number.

138787001082785 is a deficient number, since it is larger than the sum of its proper divisors (49586594217055).

138787001082785 is a wasteful number, since it uses less digits than its factorization.

138787001082785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228846.

The product of its (nonzero) digits is 42147840, while the sum is 65.

The spelling of 138787001082785 in words is "one hundred thirty-eight trillion, seven hundred eighty-seven billion, one million, eighty-two thousand, seven hundred eighty-five".