249241693345 has 16 divisors (see below), whose sum is σ = 299552947920. Its totient is φ = 199084953600.

The previous prime is 249241693333. The next prime is 249241693357. The reversal of 249241693345 is 543396142942.

It is an interprime number because it is at equal distance from previous prime (249241693333) and next prime (249241693357).

It can be written as a sum of positive squares in 8 ways, for example, as 26370836881 + 222870856464 = 162391^2 + 472092^2 .

It is a de Polignac number, because none of the positive numbers 2^k-249241693345 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 249241693292 and 249241693301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10862485 + ... + 10885405.

It is an arithmetic number, because the mean of its divisors is an integer number (18722059245).

Almost surely, 2^249241693345 is an apocalyptic number.

It is an amenable number.

249241693345 is a deficient number, since it is larger than the sum of its proper divisors (50311254575).

249241693345 is a wasteful number, since it uses less digits than its factorization.

249241693345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26196.

The product of its digits is 5598720, while the sum is 52.

The spelling of 249241693345 in words is "two hundred forty-nine billion, two hundred forty-one million, six hundred ninety-three thousand, three hundred forty-five".