138201786247 has 16 divisors (see below), whose sum is σ = 166831532032. Its totient is φ = 111971432160.

The previous prime is 138201786187. The next prime is 138201786257. The reversal of 138201786247 is 742687102831.

It is not a de Polignac number, because 138201786247 - 2¹⁹ = 138201261959 is a prime.

It is a super-2 number, since 2×138201786247² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138201786247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138201786257) 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, 7396188 + ... + 7414849.

It is an arithmetic number, because the mean of its divisors is an integer number (10426970752).

Almost surely, 2^138201786247 is an apocalyptic number.

138201786247 is a deficient number, since it is larger than the sum of its proper divisors (28629745785).

138201786247 is a wasteful number, since it uses less digits than its factorization.

138201786247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14811118.

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 138201786247 in words is "one hundred thirty-eight billion, two hundred one million, seven hundred eighty-six thousand, two hundred forty-seven".