249049671908878 has 8 divisors (see below), whose sum is σ = 373576379431320. Its totient is φ = 124524212098440.

The previous prime is 249049671908819. The next prime is 249049671908879. The reversal of 249049671908878 is 878809176940942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249049671908879) 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 3 ways as a sum of consecutive naturals, for example, 311428828 + ... + 312227503.

It is an arithmetic number, because the mean of its divisors is an integer number (46697047428915).

Almost surely, 2^{249049671908878} is an apocalyptic number.

249049671908878 is a deficient number, since it is larger than the sum of its proper divisors (124526707522442).

249049671908878 is a wasteful number, since it uses less digits than its factorization.

249049671908878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623856002.

The product of its (nonzero) digits is 3511517184, while the sum is 82.

The spelling of 249049671908878 in words is "two hundred forty-nine trillion, forty-nine billion, six hundred seventy-one million, nine hundred eight thousand, eight hundred seventy-eight".