249774772729 has 16 divisors (see below), whose sum is σ = 254971382400. Its totient is φ = 244642973184.

The previous prime is 249774772727. The next prime is 249774772757. The reversal of 249774772729 is 927277477942.

It is a cyclic number.

It is not a de Polignac number, because 249774772729 - 2¹ = 249774772727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249774772727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4244892 + ... + 4303330.

It is an arithmetic number, because the mean of its divisors is an integer number (15935711400).

Almost surely, 2^249774772729 is an apocalyptic number.

It is an amenable number.

249774772729 is a deficient number, since it is larger than the sum of its proper divisors (5196609671).

249774772729 is a wasteful number, since it uses less digits than its factorization.

249774772729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58992.

The product of its digits is 174254976, while the sum is 67.

The spelling of 249774772729 in words is "two hundred forty-nine billion, seven hundred seventy-four million, seven hundred seventy-two thousand, seven hundred twenty-nine".