138611111388766 has 16 divisors (see below), whose sum is σ = 211861287237600. Its totient is φ = 68003028538848.

The previous prime is 138611111388691. The next prime is 138611111388767. The reversal of 138611111388766 is 667883111116831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138611111388767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3086534761 + ... + 3086579668.

It is an arithmetic number, because the mean of its divisors is an integer number (13241330452350).

Almost surely, 2^{138611111388766} is an apocalyptic number.

138611111388766 is a deficient number, since it is larger than the sum of its proper divisors (73250175848834).

138611111388766 is a wasteful number, since it uses less digits than its factorization.

138611111388766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6173114643.

The product of its digits is 6967296, while the sum is 61.

The spelling of 138611111388766 in words is "one hundred thirty-eight trillion, six hundred eleven billion, one hundred eleven million, three hundred eighty-eight thousand, seven hundred sixty-six".