249662368405 has 8 divisors (see below), whose sum is σ = 299766934584. Its totient is φ = 199615166400.

The previous prime is 249662368381. The next prime is 249662368421. The reversal of 249662368405 is 504863266942.

It can be written as a sum of positive squares in 4 ways, for example, as 14252061924 + 235410306481 = 119382^2 + 485191^2 .

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

It is not a de Polignac number, because 249662368405 - 2⁹ = 249662367893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14331466 + ... + 14348875.

It is an arithmetic number, because the mean of its divisors is an integer number (37470866823).

Almost surely, 2^249662368405 is an apocalyptic number.

It is an amenable number.

249662368405 is a deficient number, since it is larger than the sum of its proper divisors (50104566179).

249662368405 is a wasteful number, since it uses less digits than its factorization.

249662368405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28682087.

The product of its (nonzero) digits is 14929920, while the sum is 55.

The spelling of 249662368405 in words is "two hundred forty-nine billion, six hundred sixty-two million, three hundred sixty-eight thousand, four hundred five".