249795396261 has 40 divisors (see below), whose sum is σ = 392863922880. Its totient is φ = 157736097792.

The previous prime is 249795396259. The next prime is 249795396271. The reversal of 249795396261 is 162693597942.

249795396261 is a `hidden beast` number, since 2 + 4 + 9 + 79 + 539 + 6 + 26 + 1 = 666.

249795396261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 249795396261 - 2¹ = 249795396259 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249795396251) 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 39 ways as a sum of consecutive naturals, for example, 10710565 + ... + 10733861.

It is an arithmetic number, because the mean of its divisors is an integer number (9821598072).

Almost surely, 2^249795396261 is an apocalyptic number.

It is an amenable number.

249795396261 is a deficient number, since it is larger than the sum of its proper divisors (143068526619).

249795396261 is a wasteful number, since it uses less digits than its factorization.

249795396261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30295 (or 30286 counting only the distinct ones).

The product of its digits is 44089920, while the sum is 63.

The spelling of 249795396261 in words is "two hundred forty-nine billion, seven hundred ninety-five million, three hundred ninety-six thousand, two hundred sixty-one".