138761745726505 has 16 divisors (see below), whose sum is σ = 182592940598784. Its totient is φ = 100394743956480.

The previous prime is 138761745726481. The next prime is 138761745726509. The reversal of 138761745726505 is 505627547167831.

It is not a de Polignac number, because 138761745726505 - 2¹⁵ = 138761745693737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138761745726509) 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, 6536105529 + ... + 6536126758.

It is an arithmetic number, because the mean of its divisors is an integer number (11412058787424).

Almost surely, 2^{138761745726505} is an apocalyptic number.

It is an amenable number.

138761745726505 is a deficient number, since it is larger than the sum of its proper divisors (43831194872279).

138761745726505 is a wasteful number, since it uses less digits than its factorization.

138761745726505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13072232496.

The product of its (nonzero) digits is 296352000, while the sum is 67.

The spelling of 138761745726505 in words is "one hundred thirty-eight trillion, seven hundred sixty-one billion, seven hundred forty-five million, seven hundred twenty-six thousand, five hundred five".