249365495807 has 4 divisors (see below), whose sum is σ = 251329003776. Its totient is φ = 247401987840.

The previous prime is 249365495803. The next prime is 249365495849. The reversal of 249365495807 is 708594563942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 708594563942 = 2 ⋅354297281971.

It is a cyclic number.

It is not a de Polignac number, because 249365495807 - 2² = 249365495803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249365495807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249365495803) 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, 981753794 + ... + 981754047.

It is an arithmetic number, because the mean of its divisors is an integer number (62832250944).

Almost surely, 2^249365495807 is an apocalyptic number.

249365495807 is a deficient number, since it is larger than the sum of its proper divisors (1963507969).

249365495807 is a wasteful number, since it uses less digits than its factorization.

249365495807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963507968.

The product of its (nonzero) digits is 65318400, while the sum is 62.

The spelling of 249365495807 in words is "two hundred forty-nine billion, three hundred sixty-five million, four hundred ninety-five thousand, eight hundred seven".