138306539585761 has 16 divisors (see below), whose sum is σ = 140376430351360. Its totient is φ = 136244698349760.

The previous prime is 138306539585749. The next prime is 138306539585779. The reversal of 138306539585761 is 167585935603831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138306539585761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138306539585701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313646911 + ... + 314087563.

It is an arithmetic number, because the mean of its divisors is an integer number (8773526896960).

Almost surely, 2^{138306539585761} is an apocalyptic number.

It is an amenable number.

138306539585761 is a deficient number, since it is larger than the sum of its proper divisors (2069890765599).

138306539585761 is an equidigital number, since it uses as much as digits as its factorization.

138306539585761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449776.

The product of its (nonzero) digits is 489888000, while the sum is 70.

The spelling of 138306539585761 in words is "one hundred thirty-eight trillion, three hundred six billion, five hundred thirty-nine million, five hundred eighty-five thousand, seven hundred sixty-one".