249281328385 has 16 divisors (see below), whose sum is σ = 322204512960. Its totient is φ = 184535305920.

The previous prime is 249281328383. The next prime is 249281328407. The reversal of 249281328385 is 583823182942.

It is not a de Polignac number, because 249281328385 - 2¹ = 249281328383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249281328383) 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, 30507706 + ... + 30515875.

It is an arithmetic number, because the mean of its divisors is an integer number (20137782060).

Almost surely, 2^249281328385 is an apocalyptic number.

It is an amenable number.

249281328385 is a deficient number, since it is larger than the sum of its proper divisors (72923184575).

249281328385 is a wasteful number, since it uses less digits than its factorization.

249281328385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61023648.

The product of its digits is 6635520, while the sum is 55.

The spelling of 249281328385 in words is "two hundred forty-nine billion, two hundred eighty-one million, three hundred twenty-eight thousand, three hundred eighty-five".