249660363317 has 4 divisors (see below), whose sum is σ = 257713923456. Its totient is φ = 241606803180.

The previous prime is 249660363287. The next prime is 249660363343. The reversal of 249660363317 is 713363066942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249660363317 - 2²⁰ = 249659314741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249660363217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4026780023 + ... + 4026780084.

It is an arithmetic number, because the mean of its divisors is an integer number (64428480864).

Almost surely, 2^249660363317 is an apocalyptic number.

It is an amenable number.

249660363317 is a deficient number, since it is larger than the sum of its proper divisors (8053560139).

249660363317 is an equidigital number, since it uses as much as digits as its factorization.

249660363317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053560138.

The product of its (nonzero) digits is 2939328, while the sum is 50.

The spelling of 249660363317 in words is "two hundred forty-nine billion, six hundred sixty million, three hundred sixty-three thousand, three hundred seventeen".