249489756505 has 8 divisors (see below), whose sum is σ = 326604772224. Its totient is φ = 181447095600.

The previous prime is 249489756487. The next prime is 249489756517. The reversal of 249489756505 is 505657984942.

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

It is not a de Polignac number, because 249489756505 - 2⁵ = 249489756473 is a prime.

It is a Duffinian 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, 2268088641 + ... + 2268088750.

It is an arithmetic number, because the mean of its divisors is an integer number (40825596528).

Almost surely, 2^249489756505 is an apocalyptic number.

It is an amenable number.

249489756505 is a deficient number, since it is larger than the sum of its proper divisors (77115015719).

249489756505 is a wasteful number, since it uses less digits than its factorization.

249489756505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536177407.

The product of its (nonzero) digits is 108864000, while the sum is 64.

The spelling of 249489756505 in words is "two hundred forty-nine billion, four hundred eighty-nine million, seven hundred fifty-six thousand, five hundred five".