249270785881 has 8 divisors (see below), whose sum is σ = 268996691264. Its totient is φ = 229623627600.

The previous prime is 249270785857. The next prime is 249270785899. The reversal of 249270785881 is 188587072942.

249270785881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 249270785881 - 2⁵ = 249270785849 is a prime.

It is a super-2 number, since 2×249270785881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249270785801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19680195 + ... + 19692856.

It is an arithmetic number, because the mean of its divisors is an integer number (33624586408).

Almost surely, 2^249270785881 is an apocalyptic number.

It is an amenable number.

249270785881 is a deficient number, since it is larger than the sum of its proper divisors (19725905383).

249270785881 is a wasteful number, since it uses less digits than its factorization.

249270785881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39373551.

The product of its (nonzero) digits is 18063360, while the sum is 61.

The spelling of 249270785881 in words is "two hundred forty-nine billion, two hundred seventy million, seven hundred eighty-five thousand, eight hundred eighty-one".