138834650997 has 40 divisors (see below), whose sum is σ = 237084883200. Its totient is φ = 79313315616.

The previous prime is 138834650987. The next prime is 138834651017. The reversal of 138834650997 is 799056438831.

138834650997 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 34 + 6 + 509 + 97 = 666.

It is not a de Polignac number, because 138834650997 - 2¹¹ = 138834648949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138834650947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2282779 + ... + 2342807.

It is an arithmetic number, because the mean of its divisors is an integer number (5927122080).

Almost surely, 2^138834650997 is an apocalyptic number.

It is an amenable number.

138834650997 is a deficient number, since it is larger than the sum of its proper divisors (98250232203).

138834650997 is an equidigital number, since it uses as much as digits as its factorization.

138834650997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64127 (or 64118 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 138834650997 in words is "one hundred thirty-eight billion, eight hundred thirty-four million, six hundred fifty thousand, nine hundred ninety-seven".