138862406249 has 16 divisors (see below), whose sum is σ = 158896937472. Its totient is φ = 118877243328.

The previous prime is 138862406233. The next prime is 138862406257. The reversal of 138862406249 is 942604268831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138862406249 - 2⁴ = 138862406233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138862406249.

It is not an unprimeable number, because it can be changed into a prime (138862405249) 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, 33596387 + ... + 33600519.

It is an arithmetic number, because the mean of its divisors is an integer number (9931058592).

Almost surely, 2^138862406249 is an apocalyptic number.

It is an amenable number.

138862406249 is a deficient number, since it is larger than the sum of its proper divisors (20034531223).

138862406249 is a wasteful number, since it uses less digits than its factorization.

138862406249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8936.

The product of its (nonzero) digits is 3981312, while the sum is 53.

The spelling of 138862406249 in words is "one hundred thirty-eight billion, eight hundred sixty-two million, four hundred six thousand, two hundred forty-nine".