138296278229761 has 16 divisors (see below), whose sum is σ = 142142961320640. Its totient is φ = 134455351584960.

The previous prime is 138296278229741. The next prime is 138296278229777. The reversal of 138296278229761 is 167922872692831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138296278229761 - 2⁵ = 138296278229729 is a prime.

It is a super-2 number, since 2×138296278229761² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138296278229741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457133895 + ... + 457436323.

It is an arithmetic number, because the mean of its divisors is an integer number (8883935082540).

Almost surely, 2^{138296278229761} is an apocalyptic number.

It is an amenable number.

138296278229761 is a deficient number, since it is larger than the sum of its proper divisors (3846683090879).

138296278229761 is a wasteful number, since it uses less digits than its factorization.

138296278229761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311904.

The product of its digits is 438939648, while the sum is 73.

The spelling of 138296278229761 in words is "one hundred thirty-eight trillion, two hundred ninety-six billion, two hundred seventy-eight million, two hundred twenty-nine thousand, seven hundred sixty-one".