249656350138 has 16 divisors (see below), whose sum is σ = 424516871520. Its totient is φ = 109161480816.

The previous prime is 249656350129. The next prime is 249656350189. The reversal of 249656350138 is 831053656942.

249656350138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252688120 + ... + 252689107.

It is an arithmetic number, because the mean of its divisors is an integer number (26532304470).

Almost surely, 2^249656350138 is an apocalyptic number.

249656350138 is a deficient number, since it is larger than the sum of its proper divisors (174860521382).

249656350138 is a wasteful number, since it uses less digits than its factorization.

249656350138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505377261.

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 249656350138 in words is "two hundred forty-nine billion, six hundred fifty-six million, three hundred fifty thousand, one hundred thirty-eight".